One panel of artistic flair showing these guys have got stronger and have godly potential and shit now doesn't mean anything.
Regardless this taking place right after RoF could make it pre retcon.
We see Goku behind Gohan during the father son kamehameha too but he's not literally there or literally adding power.
We used to see oozaru behind Goku when 10x would have been an unnecessary boost. It's just to show they are using their full power and/or have a deeoer well within them. Or it just looks cool.
Believe what you want but we aren't going to agree on this.
Goku got SS3 in seven years of heavenly training in ten years Trunks got as strong as that in a minor form (he's a hybrid like Gohan so being twice as strong in a few more years fits perfectly in the same way SS1 Gohan was a good chunk above SS1 Cell games Goku.
If he could get godly in, both as maximum potential and do it that quickly he'd had way surpassed vegeta in the rosat and he wouldn't have needed time travel and shit. The manga deliberately doesn't have him gain a godly power up or go to toe with merged zamasu. he isn't anywhere near that level.
I'm not a huge fan of the two base, as I said it was an *attempt* by fans to make the senseless anime make sense when it can't.
The manga continuity is cleaner.
We aren't gonna agree on this and you anime stand aren't gonna budge on loving your superfluous power inflation so let's agree to disagree.