Often the lastest versions of dashboard apps such as Grafana are not compatible with older versions of Safari on old devices (such as my 2012 iPad Mini which I would like to use as a simple dashboard viewer).

A workaround is to install a Firefox Docker container and use that to view the dashboard, as described here. It's a bit hacky but not as annoying as trying to jailbreak the old iPad just for this purpose…

Or use WRP, described in this Reddit post.