I think Salagir could add some sexual subplots.

It's not meant to be?

You can join the DBM discord and ask Salagir and Asura directly. They would give their reasons for not including it. I think the most we would get is fanart by Asura every once in a while but not in the story.

Strong kids? A child of Uub and Bra would be pretty busted. Only rational I can think of. 

But yeah Anju is a thing in DBM. 

Because some people think they're at the same age.

Jokes aside If Yamcha wasn't married in DBM i'd totally go for some 18 x Yamcha ships, and maybe Uub questioning why he likes Bra(U18) vs Anju(U18) because right now the Novel brings up a unique dynamic cause in page 10 we got dialogue like:

"Gohan gave his opinions on each universe he was familiar with. While passing Universe 14, they crossed paths with Bra, who looked as bored as ever and was walking in the opposite direction. They didn't say much to each other, but they all noticed the shy smile that Uub gave to Bra, who crossed them again while jogging.

After Uub passed them by, Videl noticed a smile on Bra's face, a smile that spoke volumes. Vegeta's daughter looked away and continued her journey. While Gohan and Videl finally arrived at space 15, Videl wondered if there was some sort of crush between Uub and Bra.

"They're young..." Gohan began. "Bra is pretty cute, it wouldn't surprise me."

"But Bra is more into fashion... and Uub is into fighting."

"Maybe she's into strong fighters? And I think it would be hard finding anyone stronger than him."

Squeezing her husband's arm a little harder, Videl snuggled against him. "That reminds me... Of twenty years ago..."

And in chapter 118:
Upon analyzing, Buu discovered a suitable form as well, a girl of quite noticeable beauty for whom the lad had quite more than friendship in mind.

....
“Anju!?” Uub exclaimed, turning around slowly to his childhood crush. He gulped audibly. “What’s...uh going on?”

He suddenly realized these were the first words he’d ever spoken in front of her, and was so flushed by the thought that he again fell silent.
“So, all grown up and you finally return to the village, a powerful fighter in your own right, but you’re still afraid to talk to me?” the girl said. “It’s just a dream, Uub, there’s no reason to be nervous. You can say whatever you want!”

“Oh...yeah...right...” he somehow managed to reply, his cheeks crimson.

“Don’t be nervous. You’re the strongest human being on the planet, and you’re a man now...I know you want to talk to me every time you come back to the village, so just do it. If you can’t do it now in a dream, you never will for real!”

“Oh...I suppose...” he replied, still fidgeting and staring at the ground.

“Quit that now!” Anju said abruptly.

He slowly raised his head, daring to look in her eyes.

“I know you’re shy,” his childhood friend said, “but you should think about how your actions affect other people. You haven’t spoken to me once since my boobs started to grow, in fact it seems like you’ve been avoiding me.”

“I’m sorry...it’s just...that...”

“That you think I’m cute?” she giggled. “And you wanna get to know be better, but you’re too afraid. Except, you didn’t realize that you pushed me away? And hidden behind your shield of shyness, you’ve actually been insulting me and making me cry!”

“Wha...what? I’ve never insulted you...” he stumbled

“Oh really? So when you come back to the village and talk to everyone else, but see me and immediately turn away blushing, not even saying hello, you don’t think that’s insulting? You hate me, don’t you! That’s what I think, and you want to avoid me at any cost!”

Uub was speechless. He’d never really thought of it that way, his eyes were suddenly opened. By not paying attention to the impact of his neglect...and letting his timidity win out...he had been very selfish! And by fear of approaching her, he’d hurt Anju’s feelings.”

“So, now you understand.”

“Yes, and I am sorry.”

“Good. Now, make sure you go apologize to the real Anju.”

So basically if salagir can deliver we could get a nice love triangle sub plot. Bra-----> Uub-----> Anju -----> ??(could be uub or maybe she moved since its been... 20 YEARS AND HE STILL HASN'T MADE A GOD DAMN MOVE!!!)