What you feel is more reliable than what the app says, especially if it's been like this for a month and you genuinely feel good. Oura measures physiological variables like heart rate, heart rate variability, and body temperature, but that doesn't tell the whole story about sleep. There are people whose patterns the ring reads as "poor" but who sleep great, and vice versa. The algorithm doesn't know your personal baseline or how you actually feel the next day.
That said, don't completely ignore what it's showing either. If it suddenly gets worse or you see a clear pattern of decline while your energy goes downhill too, then yeah, it's worth paying attention to. But if you're still waking up rested, not having afternoon microsleeps, and you've got energy, you're probably sleeping well. Sometimes these devices are just too strict about what they consider "optimal."
One thing you can do is stop obsessively checking the app for a week or two. Often the anxiety about seeing your score ends up being worse than the sleep itself. If after not having that pressure you still feel just as good, you'll have your answer.