And if you use the Bitwarden CLI, you can use a shell command like this to print a list of the names of items containing the password = MyPassword:
bw list items | jq -r '.[]| select(.login.password == "MyPassword") | (.name)'
Or if you want to save that list to a file:
bw list items | jq -r '.[]| select(.login.password == "MyPassword") | (.name)' > MyFile.txt