If I already hit the $30k spend, but I haven't received the extension yet, is it safe to apply for another AP credit card (say, TD Aeroplan VIP), and then cancel my AMEX and still get the extension, or am I better off waiting until the extension shows up? I'd time it so I have a premium CC linked at all times.

EDIT: NVM, I hadn't received an email but AP website already says I have status until the end of 2023. Great!