Anydesk is one candidate for remote support. Although there are alternative open source programs like RustDesk you may be forced to utilize AnyDesk for external constraints.
AnyDesk is a proprietary software, and the manufacturer does not provide Arch packages. One suggested solution is to utilize flatpack, but i personally think that all these “innovative” container formats are total crap.
The manufacturer does provide a generic tar, which can be used for installation. If you just install that, it won’t run on plain EndeavourOS. A library is missing, unfortunately one that is legacy, and no more supported, and only available via yay.
I made up a script that does all necessary installation steps. Just run it and Anydesk will be installed.