Luckily, faraday bags are (still) legal and easy to make, and cheap to buy if you want one. I've got some name-brand faraday bag that was $25 or so, which works well in all tests I've done. In a pinch can make one with similar effectiveness that may be a bit gaudy to look at, but hey, function over fashion! https://www.instructables.com/EASIEST-FARADAY-PHONE-POUCH/

I'm able to disable the camera and mic on my Pixel 7 w/ GrapheneOS via software, but unsure how well it actually 'works'. I know that when I open an app that requires either, I get warnings that the mic is disabled (As if, I open the phone app) or whatever, which I can toggle back on, if I need to.

France really has gone above and beyond as of late to prove that they hate your privacy.