I used 1Blocker for the longest time and I found it very complicated when you want to block a specific page element. It doesn’t get updated nearly enough either. I personally switched to Adguard, which seems to behave better and it’s a much simpler process for writing custom rules. Adguard also has extensions for chrome and edge, so you export and import to keep things in line. No iCloud sync yet, but they’ve said it’s coming.
There’s a lot of 1Blocker advocates out there but yeah I’m definitely not one of them. Wish I switched to adguard long ago.