No vo2max info for cycling activity?

Oh, wait. I think the FR245 does not support power meters anyway. So no cycling VO2max for you.

But it has Physio TrueUp...

No power meters for this watch?

Nope. See DCR's review: https://www.dcrainmaker.com/2019/04/garmin-forerunner-245-music-gps-watch-in-depth-review.html

"It's actually a pretty extensive list, though it doesn’t support connecting to cycling power meters or cycling shifting systems (Di2/eTAP)."

I’m not an avid cyclist but I think that’s stupid for it to not connect to them. 

They want you to buy a much more expensive multisport watch like Fenix 5, 935, or 945 for that. 

The same could be said for other feature you find in the higher end watches that you don't see in the midrange ones.

No, I don't have a power meter.
But there is a green check next to V02 max for "Training, planning and analysis features":
https://buy.garmin.com/en-GB/GB/p/628939#specs

I had a short walk during launch and used the walking activity.
It showed a V02 max value:

https://photos.app.goo.gl/CiUgkgfKeNFx7D4M7
https://photos.app.goo.gl/ov81hYLWXuRoPM7q6

So if there is a V02 value for walking, why not for cycling?

By the way, the recovery time can't be correct! 45 hours is a bit long for a walk of only 2 km... no?

So if there is a V02 value for walking, why not for cycling?

Because cycling VO2max cannot be calculated without power data.

By the way, the recovery time can't be correct! 45 hours is a bit long for a walk of only 2 km... no?

Depends on your fitness level. If the device thinks your heart rate was extremely high for this walk, then this might result in a high recovery time.

Or perhaps the 45h recovery time was carried over from a previous, much harder workout. A long recovery time does not get overwritten by later less intense workouts.