To be fair, irl shipping isn't bad as long as you're not weird about it
As long as the content creators have BOTH said they're comfortable with the irl shipping, it's fine as long as you don't do anything weird with it and stay respectful to any boundaries they might have
For example, Dream and George are both adults and have both said they are comfortable with the shipping, and apparently they "joked about it before youtube" 👀 (on dream's boundaries page)
They also said that they usually like to laugh and cringe at some of the fanart HAHA, and by the way they act about the ship, joking about it and making sus comments on it, they seem quite comfortable with it LOL (for example, if you watch this clip, you see how Dream reacts to "DNF" being said as "Did Not Finish," and he goes like "cmon guys, they're- hhthey're t-heh-talking about dnf, cmon...")
But like shipping minors or adults who stated they're not comfortable with the shipping is very weirdchamp. Don't do that lol
So as long as the content creators have said they're okay with it, and as long as you're not being weird and respecting them as people, then it's okay