1. Buy a used smartphone with postmarketOS support[1]. I suggest Poco F1 if you want to make phone calls with it right away (or) Oneplus 6/6T if you can wait a bit long for it to be fixed. I use Poco F1 as a daily driver and these are the most powerful, feature complete Linux smartphones right now.
If your work depends upon tool adamant on glibc and couldn't be compiled for musl then Mobian works on the aforementioned devices[2] too.
Use a foldable bluetooth keyboard, case with kickstand; you can get just as productive as a GPD albeit more portable and also feel good about taking away a device from potential e-waste.
2. Buy a 11" used Chromebook (Mainly used in schools) which is supported by Mr.Chromebox's UEFI firmware[3], You can use any Linux with it but I use PeppermintOS for its light weight and OOB support for Chromebook. Of course any portable laptop could run Linux, But they tend to cost 2x-3x the Chromebooks.
[1] https://wiki.postmarketos.org/wiki/Devices
[2] https://wiki.mobian-project.org/doku.php?id=install-android