Yes you can just create the pr. Make sure when you open up the pr, that you change the description, also after that you will see some checkboxes in the comment, to go through to figure out if you didn't forget something.
Also I quickly tested the idp bug and could reproduce, in my opinion the title of the issue might be confisuing. I first thought it works correctly, but the thing is, if i click save again after the create, than instead of updating the idp it creates a new one. this is only the case for the ldap idp not for the types of idps (like gitlab)