For instance an RPI that just boots straight to a full screen browser with nothing else. I’ve used Magic Mirror but I want to switch to a web based dashboard instead.
Edit to clarify: Specifically talking about a cheap computer and monitor setup, not a tablet and touch controls won’t matter.
Realistically, any LTS distro from a netinstaller or minimal image that can use a kiosk compositor like cage. So, the usual suspects of Debian, OpenSUSE, AlmaLinux, RockyLinux (or a derivative of one if the native distro doesn’t support Raspberry Pi). Then you just have cage open the browser of choice on startup (e.g.
chromium --kiosk <url>) and you have a lightweight and relatively secure web kiosk.