I know this is filler. But is it possible that Canon Boohan can rip the universe just like he did in filler? He's base form is enough to rip a dimension to escape from Rosat.
The difference between Super Boo and Boohan is only so much and Boo screaming his entire face made a small hole. No he couldn't, the universe is...kind of big.
Filler-wise, it's hinted that what happened in that scene was that Gohan-Boo had accessed some of Chibi Boo's hidden powers (at least, IMO).
Koshka (aka Catouttahell) made a post about that hypothetical scenario on Neoseeker. And I remember basically copying that and posting that on another forum as a "what-if."
So, no, Gohan-Boo (canon-wise) can't do this, because he's above Chibi Boo, and the only way that filler Boo could do it was through Toei Chibi Boo, basically.
Honestly, considering that he was able to rip a hole through dimensions using his own raw power, with added power he gained from absorbing Piccolo, Goten, Trunks and Ultimate Gohan, he's certainly capable of doing something on a much bigger scale.
It's useful to remember how Boohan achieved the feat he did in the filler. It was through ripping open dimensions across the entire universe, so in a hypothetical scenario where if he opens one up and it stays permanently, then he can theoretically open up enough to do what Boohan did. It'll likely just take a hell of a lot longer.