Our passports were down to 2-pages left. Even though they expired May 2028 they no longer allow adding additional pages in the one you have.
Had to do it at the post office because I lost the credit card passport which required extra sheets to file. Sent them in on Friday January 21st and received our 50-page passports today Saturday February 15th.
Felt that was a reasonable time. Now we are good to February 2035.

Jim
https://ibb.co/hDHxNN5