is there a way I can do a search for all saved sites/logins where I used a specific username?
And the same for password… can I do a search in all stored logins in bitwarden where I used a specific password? (e.g. when password I search for is “password” it should not find “passwordeiurw8e6324j32847”)
Just export your vault to a .csv file, and open with a spreadsheet or database. Then you can search and sort on the data any way you like. (Settings->Export Vault). Don’t forget to delete the files as soon as you’re done with it.