It’s easier if you copy an existing technology because the FDA clearance is easier

The problem is that for many of the innovations people want, you can’t just copy existing tech. Current BP measurements require a cuff, and BGM requires actual blood samples. To put either tech in a watch form-factor requires new tech to be developed, and then that new tech has to be proven to the FDA at a certain level of efficacy.

That is much easier said than done.

Wrist temp does have some value, particularly for women looking to track their cycle.

All of those features aren’t something you can put in any watch sized device right now - at least not in a way that the FDA would allow.

Apple is no doubt working on them, but they are many years away.