Here is my silly little mod/hack. It works for me but, obviously, your mileage may vary.
I have an S24U inside an Otterbox Defender Pro case. Slapped an adhesive steel ring on the back to hold a MagSafe popsocket so I can hold it. Chunky, but given how clumsy I am it's what I need.
I occasionally need a battery top up, as we all do. So what are my options?
1). Leave my phone inside a bag connected to powerbank?
2). Put the power bank in my pocket and my phone in the other pocket or my hand?
3). Put the power bank in my bag and have the charging cable run the length to my phone in my hand or pocket?
Or I could put a MagSafe magnet on my Anker Zolo powerbank and use that!
Super chunky but it all works perfectly.
Also added a metal ring to the other side of the Zolo to hold my large magsafe popsocket at the same time!
It's a monster! Luckily it only needs to be on for a few minutes to bring the phone to 80%.
For those wondering, yes a MagSafe magnet on the rear of the phone does affect the s-pen. Fine on the bottom of the screen, wonky in the middle. Remove the magnet and the the steel ring does nothing to the s-pen.