Can I sign up for Audit Defense even after I e-Filed my return through TurboTax?

I have a TurboTax Advantage subscription that I got when I bought TT Deluxe for TY2024.  But I didn't sign up for Audit Defense when I filed my TY2024 return with my desktop TT Deluxe.

I have not been audited and don't expect to be.  But I do have some questions because I still want the Audit Defense just in case:

1) Since I have a TT Advantage subscription, doesn't that mean I am automatically signed up for Audit Defense since I believe it is included as part of the Advantage subscription service?  I find this confusing.  Do I automatically get Audit Defense when I signed up for the Advantage subscription?

2) If it doesn't mean I am automatically signed up, can I sign up now free even though I already filed?