As I currently have no android device I can not recommend any apps, but I’m sure there are some caldav (it’s a standard) compatible apps which allow consuming the caldav todo list.

There is no problem using the default reminders app as it is caldav compatible. So as long as you do not use iCloud I do not see a problem there.

I am also using the default apple reminders app but with my selfhosted Nextcloud account, which makes it independent of the apple ecosystem.