Nope, I unlinked my Proton account and then re-added it but in Proton Pass sync is still there.
Yes, but if you don’t have an account linked the sync itself doesn’t work and you don’t risk to delete your SL aliases in Proton Pass.
But SL needs to be linked to my Proton account to get the Premium 
this might be kind of silly to do but…
you could create a new proton account, have SL forward to that account and that account forward to your paid account.
This way the account linked with the your proton pass is not the same as your SL account.
problem is you would need to re-arrange your subs a bit as you wouldn’t be able to get SL premium through Proton.
I have no intention to pay extra 36 USD to SL for their mistake you know 
I am already subbed to Proton Family which costs a lot.
I need to find another trusted provider for my aliases.
Also, I can’t imagine what would I do if all of my aliases were on SL domains. I don’t think I could recover from that easily.
Yeah… I am pretty sure that I won’t be renewing my Proton Family account on Jan 2026, but considering the cost and privacy benefits, it will be hard to find another provider.
Addy is good. Their new app is great as well