You’re welcome.
I believe that is the current listing as it pertains specifically to Blocs.
As seen @29sec in the following video
You will find the list in Blocs via the Subclass Lib - corresponding to the Subclass Reference Guide.
https://help.blocsapp.com/subclass-reference-guide/
In Blocs > Subclass Lib:
You can also find various other Bootstrap Class References online which are specific to Bootstrap itself, for now make sure they are for Bootstrap 3 whch Blocs 2.X.x currently uses.
Otherwise you can dig into the “Style.css” which Blocs exports and look through the various Blocs specific classes, etc. I talked about that briefly in a couple of other posts you may remember: Post 1 | Post 2. from another thread.
Blocs 3 may bring better ways of targeting and styling page items, Blocs/Brics/Etc. Time will tell, but I am optimistic things will continue to improve for all users.