Help for a blind friend

.

I'm trying to a help a blind friend accomplish what seems like a simple task, but I can't figure out.

There is a regularly occurring Zoom meeting he would like to attend using his iPhone. He can only use this phone via vocal commands. So what I need to do is set it up so he can say, "Siri, launch Zoom," and it will open the meeting. Or at least require very few (and vocal) additional steps.

The meeting is one that can be joined at any time, even though other people are only there one hour a week. So if Zoom could just not leave the meeting, that could solve the problem. (He doesn't use Zoom for anything else.) But that doesn't seem to be an option.

Anyone have any clever ideas? I'll be visiting him again next week and I'd love to have some options to try out.