So Oppo’s do not disturb only does it for time periods rather than by calendar events. Using polite can alleviate this, but it’s weird they cut it out when regular android has had this since android 8.0.
It’s one of the drawbacks with custom android. On my Huawei Mate SE, you can’t change notification sounds and on my Realme XT, you don’t get a native bluelight filter or do not disturb by calendar events.
Though if I had to chose between those two options, I’d take the XT any day over the Mate SE. I rely heavily on custom notification sounds to decide responses