Our X-ray intelligence showed us some screws under the foot, so we concentrated our fire on the adhesive holding it down. Only after some serious heat-gunning were we able to slowly peel the foot up and off.
Even knowing the screws are there, we're prepared for the worst, after that gooey chore...
...but are relieved to find those repair-friendly Torx screws ready to unscrew. Also under the glue-foot is a 14-pin port, probably used to test or program HomePods on Pogo pins during assembly.