If you want a self-hostable thing, https://www.adminer.org/ is a single PHP file you can put on a webserver and use to manage a database[1] that the webserver can talk to; put in the server name and credentials and have a low-effort useful GUI management tool.

[1] It claims: Works with MySQL, MariaDB, PostgreSQL, SQLite, MS SQL, Oracle, Elasticsearch, MongoDB, SimpleDB (plugin), Firebird (plugin), ClickHouse (plugin)