I don’t think I have enough knowledge to solve this or say anything for certain, but I wonder if the power button is treated as an external keyboard and is getting ignored in tablet mode?

Regarding your mouse double clicking, some Reddit users suggest pressing the click button quite hard a few times…

Not recommending against RustDesk - it is a very cool project - but regarding the “Why?”, you could use a VPN or something like Tailscale which has MagicDNS that’ll resolve hostnames of computers to their local IP address. You can use this with GNOME’s RDP server to remote in from another device pretty easily.

PairDrop(dot)net is a fork with a bit more features

Strange. The default keyboard works wonders for me but doesn’t automatically pop up. Are you able to swipe from the bottom edge of the display to make it pop up?

Right? Even MacBook Pros have larger batteries in the 14 inch and 16 inch lineup.

Just use Waydroid instead: https://waydro.id, much lower overhead, however you need to mess with ARM emulation. For installing Google Apps and Device not Play certified: https://github.com/casualsnek/waydroid_script

More info: https://wiki.archlinux.org/title/Waydroid

Dell laptops have mostly just worked on Linux quite well, but you may run into issues with the camera, however this hack(?) has worked for me: https://github.com/stefanpartheym/archlinux-ipu6-webcam.

I believe Dell has a catch for the camera saying that it may use more CPU when in use. Whilst the laptop is Ubuntu Certified, the camera only works if you select the Ubuntu option instead of Windows, and use the install they give you.

Some other nice things to have:

• fwupd should also work for firmware updates, hopefully. My speakers sounded worse on Linux than Windows, some tinkering with hdataskretask helped a little, however it’s still worse.
• This should let you change some bios settings, like changing charge limits and thermal profile (cool, performance, balanced etc): https://github.com/dell/libsmbios
• This GNOME shell extension allows you to change charge limits easily: https://extensions.gnome.org/extension/5724/battery-health-charging/