That's just the problem with "clear and obvious". The commentators mentioned it, and it seems entirely likely based on the refs hesitation, that he awarded the penalty so VAR could sort it out. In real time it looked like it so understandable if he'd lean that way.
The fact that it wasn't "clear and obvious" it wasn't a penalty meant they were never gonna overturn it no matter the refs decision. If he didn't call it, nor would have VAR.
I went to the Arsenal Palace season opener last season and would just squeeze fuck out my gf's leg when we scored ๐