This is a random feature on my Garmin I like, it shows the barometric pressure of the past 3-4 hours, and if it drops suddenly it gives a storm alert so you know within the next hour or two the weather gonna turn. Anything similar for AW?
After having some Garmin watches for a long time I miss this functionality too. There are a lot of apps that you are looking for, but the only one with a graph on the AW is this one:
Alti-Barometer is in a class by itself. The app uses your iPhone’s or Watch’s sensor to automatically and continuously record your barometric pressure and altitude. Even while your iPhone is in standby or you're using other apps, Alti-Barometer will seamlessly process and record pressure data...
apps.apple.com
Unfortunately, there are some in-app purchases to unlock full features.
I recommend this app too. It has quite many functionality even in the standard version, but you need the phone with you to use it. In the full version there is watch-only feature too.
The developer is also very nice and quick in answering you questions.
Just beware that if you move fast some false positives can arise.