Any Intel Windows tablet will run Linux, most of them without any issues.
On the ARM side your best bet are Chrome OS devices (Chrome OS itself is a pretty mainline Linux and the devices run Coreboot), some of which are tablets. Most interesting to me currently is Lenovo's Chromebook Duet, which comes at 280$ for 4GB of RAM and 64GB of storage or 128GB for 20$ more. Maybe that's enough for her.
Last time I tried Chrome OS on my tablet (Dell 5285, not a bad main machine and quickly falling in price) I wasn't very happy with it, but maybe it's better when pre-installed. It can in theory run Android and Linux apps, which seems pretty cool to me.
Unfortunately the Linux tablet experience in general is not nearly perfect. Your best bet is GNOME and even that kind of sucks (well, it's GNOME).
On the ARM side your best bet are Chrome OS devices (Chrome OS itself is a pretty mainline Linux and the devices run Coreboot), some of which are tablets. Most interesting to me currently is Lenovo's Chromebook Duet, which comes at 280$ for 4GB of RAM and 64GB of storage or 128GB for 20$ more. Maybe that's enough for her.
Last time I tried Chrome OS on my tablet (Dell 5285, not a bad main machine and quickly falling in price) I wasn't very happy with it, but maybe it's better when pre-installed. It can in theory run Android and Linux apps, which seems pretty cool to me.
Unfortunately the Linux tablet experience in general is not nearly perfect. Your best bet is GNOME and even that kind of sucks (well, it's GNOME).