Posts and podcasts are different feeds
An RSS feed for community posts helps a feed reader track new discussions. It is not necessarily an audio podcast feed that can be linked to a Yoto card. Use podcast guidance for audio feeds.
Find and check a public feed
Open the desired space on YS and look for its current subscription or RSS option. Use the address offered by that space, then open it in your feed reader and confirm the item titles match the space you intended. Public feeds should work without your session cookies.
The old article assembled a directory from guessed space IDs and included unknown entries. Those guesses are not being republished as verified feeds. If a feed requires a login, includes a personal token or returns a web page instead of RSS/XML, do not submit it as a public feed.
If it stops updating
Check the source space for recent posts and its current subscription options. Remove obsolete addresses from your reader rather than trying random IDs. Feed availability belongs to the external service and can change independently of TOYO.