[2020] Unlinking a PS4 account from an EpicGames account

Hi everyone, so I've got a friend who's got a complicated situation that I'm trying to get through and need some clarification.

Here's what's happened. She has a PSN account which is connected to an EpicGames account but the EpicGames account is her ex-boyfriends and he has turned on Parental Controls, changed the EpicGames password, enabled 2FA, the works. She can't voice chat or anything anymore because he set it so she can't do it.

She can still get into the account on a laptop and is considering unlinking the account, but we need to know if it'll reset the PS4 progress rather than the PC progress. She owns her PSN account and it had Fortnite on it BEFORE it got linked to her Ex's EpicGames account, so... will her progress be reset?

TL;DR - Friend's ex-boyfriend is messing with her account, will unlinking reset PS4 or PC when PS4 came first?