I thought it was also to manage database locally. While I don't use if for that, it can be useful to view the (local) database schema from within Wappler.
Edit: it took a couple of click to access the remote database too. Perhaps that will be useful.
Not sure what do you mean by "locally" here but i think there is some big misunderstanding here of what database manager does and what is it used for.
Using database manager you can:
Using the server connect connection you:
Thanks for this explanation. As I was using Wappler long before the Database Manager was added, I’ve just carried on as usual, not taking much notice of the feature. I can see why it was added but I prefer managing databases externally - partly out of habit, partly because of the additional options (and also on a different monitor which is very convenient).
Have you properly set up your Server Connect connection under globals? Open it and edit it with the details per the selected target.
@Teodor yes
I think this is going to take a while so I don’t even want to bother with DB Manager. So I was wondering if we can use security providers and restricting pages with an external DB or a custom extension of some sort
DB manager is not related here!
You just need a Server Connect Database Connectio made properly. Probably your connection details are not right, so that the tables are not populated!
@Teodor you got a fancier server connect 
But as I mentioned earlier, connection is OK
The main problem is actually showing my tables, and the error of Wappler fetching more a row for schemas
It looks different for PHP server model, that's not the issue.
I see George commented this above, but ARE YOU SURE you have entered Database Name in your connection details in Server Action and in Database Manager:
This can NOT be empty.
db
What is already in the database? Seems the table query is returning multiple tables with the same name.
Well just empty the whole database and start over - you seems to have messed it up with all the previous attempts
dbs
Please delete and recreate the whole database - not just deleting the tables, there is much more meta schema involved.
@George Well, that would beat the point of using Supabase dashboard if I got rid of its features, wouldn’t it? You are suggesting to just connect to a raw postgres.
How hard is it for Wappler to just pull all the schemas?
Well Wappler uses knex and some of its queries to fetch table data, like this one:
select table_name, table_schema,
(select obj_description(oid) FROM pg_class
where relkind = 'r' and relname = table_name) as table_comment
from information_schema.tables where table_schema = 'public' and table_catalog = ? and table_type = 'BASE TABLE'`;
Like to fetch many comments for the tables, but seems your database have two comments for non existing tables
There is a FR open for that. You can vote for it.