Whatsapp no longer works on any aosp ROM, even with locked bootloaders. It requires attestation and bootloader lock, so the only way to use it it either with stock ROM, or - like I currently am - with matrix bridge (which pretty much sucks).

I wish I could convince relatives Signal is the same, but better, but they are still on Yahoo and Facebook, so they are a completely lost cause (even my wife doesn’t want to, as she says she already has WhatsApp and that’s enough).

Edit: End rant. You might not even use WhatsApp and then you can be happy. i suggest you install and use the Sapio app to check some of your apps compatibility.