It's good but misleading; you can't put the BPM at the bottom as shown in the screenshots, so I don't rule out that other things are there just for aesthetic purposes in the advertising.
SP Watches
Thursday, January 1, 2026
It’s a custom complication so you can add any data that you want and these screenshots are from Galaxy Watches where you can add Heart Rate Custom complication whereas on Pixel Watches that complication is missing, which have nothing to do with the watch face its just how Google and Samsung have designed their complications.