I discovered powertoys only recently, and it's a pretty cool set of tools. From color picker, tiling window manager to regex file renames or copy/paste tools, it has a lot of QoL features.
If you have to be on windows, i.e due ro work, I recommend not sleeping on it.
IIRC there is at least one dumbphone that runs signal, https://www.punkt.ch/en/products/mp02-4g-mobile-phone/, but that's expensive and not something you'd usually get if you think dumbphones.
But yeah, the point of having a dumbphone is not security or privacy, at least for me and most of the people I spoke with about it. The point is you have your phone as a backup emergency comms, and just learn not to use and rely on instant communication and internet access. Maybe an occasional "I'm running late" messages, but other than that, the point is you just wait until you get to a PC.
And even for emergency comms, I had a dumbphone that can make a 4G hotspot, and had a GrapheneOS smarthphone without a sim or internet powered off in my bag. And if I needed to sort out anything, I just fired up a hotspot and turned on the second phone.
The fact that it was annoying several steps was the point, so you do it only when absolutely neccessary, and eventually quickly learn not to do it. It has improved my life by a lot, getting rid of this "always online" addiction/reliance.