I FOUND A FIX YALL!!!
I found this out a while ago on mobile!
Open the Spaces App ➡️ Go to FDS home screen on phone (NOT the Spaces app, enter into the actual FDS forum) ➡️ tap 3 dots on top right ➡️ tap Manage Notifications ➡️ tap Push ➡️ scroll down to 'Forum' menu and you can turn off the 'likes and reactions' notis!
Edit: idk if iPhone & Android are the same
P.S : there is a glitch where, if you swipe to refresh the noti bell screen enough times, it WILL show likes. DO NOT I REPEAT DO NOT DELETE, MARK READ, OR INTERACT WITH THOSE NOTIS AT ALL. This will make the app count them as "legit" (if that makes sense?) and you'll be swiping for an hour and a half (believe me I've timed it) deleting them all. EVEN when your settings are still at replies only! When this glitch happens: simply close the app and clear cache like crazy, and take a few hours or so away from Spaces app. They will disappear by themselves.
There is a second glitch too.
If you sign into the FDS website, either on mobile or on computer, all those likes will start appearing again in the Spaces app too! Regardless of your original settings! So just stay on the Spaces app until that is fixed! Thank you! 💕