PS. I typed this under my desk!
I also have an Apple Watch Ultra. My feeling has always been that Apple Watch Ultra is a smartwatch first, sports watch second. Garmin watches are sports watches first, smartwatch second.
I was an early adopter of smartwatches with first the Moto 360 and then Apple Watch Series 1 and I have found that I use the smartwatch part less and less. In the end I only used it for notifications for two apps (Signal and WhatsApp), sometimes for calling my wife when I'm on a bike, and contactless payments. These I can do with a Garmin as well, but it far less clumsy as a sports watch than Apple Watch.
Plus Garmin Watches generally work with GadgetBridge, so they are much easier to use in a privacy-preserving way.