Thought I'd dig this out of the Community 'Help' bit:
"Subscriptions let you get email updates whenever new content appears in an area of the community that you're interested in. You can subscribe to a board, a blog article, an idea exchange, or any other location in the Community. You can also subscribe to a specific post.
To subscribe a piece of content:
Go to the item you want to subscribe to.
To subscribe to a location, click(Location) Options > Subscribe. To subscribe to a specific post, go to the post and click(Post) Options > Subscribe
To view and manage your subscriptions:
Go toMy Settings > Subscriptions & Notifications.
ClickMy Subscriptionsto see a list of the items you've subscribed to. You can click a subscription to go to the item.
To delete a subscription, click the check box for the subscription and clickEmail Subscription Options > Delete Selected Subscriptions."
just to add I'll put up a few pics here which may help. When clicking location firstly I get the first screen, as an example I'm picking Suggestions and Ideas- I would click the 3 dots in order to subscribe.
My Device- S21 Ultra 5G ( SM-998B/DS ) CSC= BTU , 12GB/256GB One Ui 3.1,Android 11