Remote connection to Home assistant raspberry

I would like to place the home assistant in our summer house and have access to it. The main problem is that I will use mobile internet from an old iphone there so I am unable to open the port. I would like to have access to it directly, to see what is on the local network and also check the webUI of home assistant. If I understand correctly the home assistant does not provide os with desktop and I cant install any of and I cannot install docker image on raspbian because in that case the add-ons of Home assistant are not supported? Installation - Home Assistant Is there anyway to actually have a desktop access and also functioning add-ons home assistant?