Can I ask my boyfriend to unfollow someone?

As far as i know they're not really friends more acquaintances, she recently started doing OnlyFans and therefore posts a lot of nudes to promote it and it just makes me uncomfortable. I know there's like a line where its inappropriate to ask something like that but I don't know. Also we've been going out for 8 months if that helps.
Can I ask my boyfriend to unfollow someone?
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