Depends how fussy you want to be. But it would be pretty easy to design the MagSafe holder so you insert the charger from behind, and there’s a thin layer over the front to hide the charger itself.
Or if you want to get really fancy, the MagSafe magnet arrangement is well documented, and you can easily buy adhesive magnets that arrive in the correct pattern and orientation, which would allow you to embed the magnets completely within the print, and later add a standard Qi charger to provide power.
I’ve personally torn down Qi chargers and embedded them in furniture to create completely integrated, and “invisible” wireless chargers. On the whole it’s pretty easy todo, only major downside is higher power losses because there’s more space between the charging coil and the phone, and your coil alignment will be less accurate than Apple. But it’s still a completely functional charger.
The appear of the design is that you just slot in a USB MagSafe charger. There’s no custom electronics involved at all.