In xfce (thunar) i see window where i enter the root password and can use the ssd
In Hyprland i see this error
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You might want to look at installing and setting up an authentication agent.
https://wiki.hyprland.org/Useful-Utilities/Must-have/#authentication-agent
What I did instead (unrelated to Wayland) is installing udiskie and let udisks2 handle all the mounting. I just plug in the device and it gets automatically mounted in user context without me having to provide any passwords or whatsoever.
Thanks
I installed and added in autostart polkit-kde-agent
Now I can use ssd in Hyprland
Maybe in the future I will try your method with udiskie and udisks2