This holder was designed around an iPhone12 (in a Tech21 case) but it would probably work fine with other / smaller phones too. The holder has a male connector built in underneath to work with Garmin compatible mounts.

I use this on my static turbo trainer and have fitted a wireless charger for convenience (https://www.amazon.co.uk/JE-Furniture-Grommet-Desk-Surface-Port-Hole-fast-wireless-charging-Certified-Qi-for-Furniture/dp/B07TS5QL72/ref=cm_wl_huc_item). There is also room for a standard wired charger plug.

Note this is for indoor use-only as the phone is not secured and just sits within the mount. Also would not recommend it for an extremely vigorous turbo work out or use on rollers!

Creality

Ender 3 Pro

No

Yes

280

20

Print with bottom side down to minimise support required. Might need to spend some time cleaning away support around Garmin connector to ensure a good fit onto mount.