I see that WefWef says you can export your subscribed subreddits to it, but I don't get the option. Is it too late now, or can you use another service?
It used to be there before the API shut down at the top right corner of the settings screen. However, I don’t think it could possibly be functional now because it would require API calls to get a list of your subs. So it’s probably just gone now.
Apollo did have a local list of your subs and filters. It was able to save more filters than Reddit allowed. It was still accessible after Apollo’s API access was shut down.
They changed the process a bit, now you'll have to use Reddit's multireddit feature to generate the list. Make sure you're on the latest version, and just go to Settings > Migrate :)
I can’t find it either. My guess is Apollo can’t know what subreddits you subscribed to without checking with Reddit, which is not possible because Christian quite literally deleted the Apollo API credentials.