The new Oppo watches are the very first with rectangular screens. I am working on version 9.84 which will support the new form factor. Expect the first beta within a week. Thank you for your patience!
Update (9/29/2020) The first beta of v9.84.1 was submitted to Google for approval. It should be available to beta testers very soon!

I am working on a new way to add date / digital time to Bubble Cloud watch faces independently from bubbles

All 1-click watch face themes are coming to your home screen on the phone or tablet too!