I also have two stands. One on my nightstand and one on my desk. I use them to charge my pixel 5 and pixel buds all the time. I used to charge my pixel 3. They were originally supposed to say charging rapidly when you placed a pixel on them. It never did with my pixel 3. I even contacted support and they said HUH that's strange it's supposed to say that.
When streaming on the stand, most of the time I get the media player controls and not the picture frame. I find that if I pause the stream eventually the picture frame will start and I can start streaming again using the ear bud controls without stopping the picture frame.
I have at times a hard time aligning the phone. Sometimes the phone starts charging right away and other times I get a message that say to realign the phone. I have seen that issue with both the 5 and the 3. Sometimes at night I see the charging time will say 15 hours to recharge from 70% and when I realign the phone, it will say 48 minutes.
I have the screen go blank when it is charging on the night nightstand, but a few times I noticed the screen on and a yellow LED on the stand. To clear the yellow LED, I have to unplug it and plug it back in. These are supposed to be connected devices, but there are times it will change and not be connected. A few times I have been prompted to set up the stand when it has been set up already.
I with the bottom edge would hold the phone in place better. When you are using a case, there are times it will just not sit properly and will slide off.