Hi Nadia, just wanted to thank your post. It worked. I have a Samsung S23+ phone, I don't like their email app, that's why I bought AquaMail, but their calendar app is great, and now I have the best of both worlds.
Just I would add something for other members that could be helpful. My AquaMail is spanish, so, when I went to Ajustes => Calendario => Ver en el calendario , once I clicked on it, a pup-up came up requesting permissions to access Calendar. I gave permissions (Only when app is running, maybe I will have to change that to always), and after 15 to 30 seconds, inside Samsung Calendar, the meetings started appearing. I have Office 365 (Microsoft 365).
All the best, Juan