it doesn’t even need to have i.delta.chat, actually that is just a hack so people can see a nice page if they don’t have DC installed, the invite links are actually this type of link: openpgp4fpr:1EDD34FF7513D09F6DA300A765285E7A1C9DA72A#a=simplebot08%40gmail.com&n=Mia&i=9BnkBMZU3lZ&s=l5CJimJA-tV and you can share that as well go to your invite link in the browser and copy the “open chat” button’s link to clipboard
that can only be done if you use the government’s messenger to send the link, using any medium that is e2e encrypted or not in the hands of the gov will be safe, ex. in Cuba the government is blocking i.delta.chat and any *.delta.chat subdomain for that matter, still people exchange Delta Chat links via Facebook, WhatsaApp, Telegram, etc