wp-admin shouldn’t need any Page Rule, unless you’re doing some sort of Cache Everything, in which case it’d need a Cache Level (Bypass) Page Rule for wp-admin*
You can generally leave Page Rules alone until you’re pretty familiar with how Cloudflare works. Feeds shouldn’t be cached in the first place, as I believe they end in .rss
And bots should already have access to your site.
wp-admin shouldn’t need a cache bypass because the secret stuff shouldn’t be cached in the first place.
All this is assuming you haven’t tampered with caching with a Cache Everything page rule, or added a firewall setting that is blocking good traffic.