Moons gone from 3 years ago?

Hi everyone, I used to be quite active in this community 3-4 years ago. I had accumulated some Moons at the time, not sure exactly how many but definitely a few thousand.

I don’t seem to see any Moons on my account now, however. Does anyone know if these were reset somehow? Have I permanently lost access to all my old moons? I haven’t checked in a fair few years and randomly remember to have a look at what was happening in this subreddit.

Is there a way to check my balance? I remember it showing directly in the Reddit app. Thank you everyone in advance!