For folks who don't understand why anyone would want TouchID...
Partner and self both rocking SE3s, bought because they had TouchID, will both leave the iOS ecosystem if a TouchID option isn't available when our current phones lose security updates. TouchID is an order of magnitude more reliable than the FaceID on my M2 iPad Pro, and a home-button TouchID is a vastly better experience for purchasing via NFC than FaceID, because you can transfer the phone from pocket with thumb already on the button, directly to the reader, feel the haptic, then straight back to pocket; no holding the phone up to your face. A non-negotiable, I can authenticate in my N95 and tinted glasses; an officially unsupported configuration for FaceID.
If we're in propane / oxy-acetylene safety glasses and respirators in our studio, we'd have to remove a work glove to type the keycode anyway if we were using FaceID, so removing it for TouchID is still faster.
If I could remove FaceID entirely from my iPad, and get a bezel with a home button, I'd do it in an instant.
FaceID isn't more secure in practice; in my experience it fails more often, and requires a passcode to be entered more often - can't unlock a device flat on a desk because the angle is insufficient, so the answer is the shortest passcode possible.
An alternative to a side button on a folding phone, would be for one external face to be like a Home button iPhone, with a find-by-feel TouchID button in a bezel, and an e-paper-like always-on display for notifications, stuff you wouldn't open the phone to see.
Of course they might have cracked in-display ultrasonic TouchID...