Hi there!
Same boat as you, waiting for maintenance loan with OU. Also can't login to student finance this morning to check as the website is down for improvements but assuming nothing's changed yet.
OU don't do confirmation to student finance until 2 weeks after we start, at the earliest. So they should be doing confirmations next week, I'm planning to call the OU fees team in the morning to confirm. I started on the 5th which was a Saturday so the earliest they'll do confirmation for me is tomorrow.
If you're an OU student getting maintenance loan its best to ignore the dates provided by student finance and expect to wait an extra week at least - not student finance's fault but just the way OU do things. With all being well we should get our first payments within the next week. That's how it worked last year so expecting this year to be the same.
Hope that helps 🙂