Be aware that the CBP officer, at the border, will determine the length of each authorized stay when you enter the US. You are not guaranteed a specific length of time. Also remember that entering and exiting too much can result in serious consequences. Do you have a plan B if the B2 is denied? They could cancel your ESTA.
The OP was advised, several days ago, that the queue for ISL is a couple years or longer. The OP has also posted, several times, his DQ date as 2022.
DQ since December 15, 2022 - US Embassy and Consulate Discussion - VisaJourney
Naturalization Certificate is a legal name change document. Not sure you can do it during a same day as interview ceremony. A Judge has to be involved.
"At the time of the interview, the USCIS officer will record the name change request and ask you to sign a name change petition, which USCIS files with a court before the judicial oath ceremony. Upon receipt of the petition, the court signs and seals the petition."
Some couples choose a fast courthouse wedding and a big ceremony later. That could pay big dividends later when Conditional Green Card vs 10 Green Card will be determined.
Attend the interview as scheduled. Try to reschedule the medical if possible. Worse case scenario is that your visa will remain on hold after the interview until the medical arrives at the consulate.