Great point!
I think that there are 2 main considerations regarding whether porn is "feminist" or not.
1. Was the porn produced ethically? This is the most important characteristic.
2. Is the porn promoting ideas that are against feminism? If so, but it's still produced ethically, and it's made clear it's a fantasy scenario made by consenting adults, why is it more concerning than other forms of media that are sexist or have problematic stories? For example horror movies that have women being murdered in them in gruesome ways? Or songs about women being "bitches"? What people like to consume as fiction isn't the same as reality. Even some feminists get turned on by rape fantasies or misogyny porn, because of kink. When they would hate it being in their real life. The problem is if the misogynist messages in some porn aren't counteracted by the availability of other types of porn that shows either female dominance or gender equality, respect, mutual pleasure etc.
But there already is SO MUCH porn that focuses on female pleasure, and has love and intimacy in it! The popularity of amateur porn is an example. I recently discovered the channel devoutdevour on PH and it's beautiful! Two hippies who are clearly deeply in love and extremely horny, getting it on in nature, with the main focus being on female pleasure!