Google “os 11 battery issues” that will provide you an answer.
Yes, and read the “problem”. It is the matter of updating your apps, of re-indexing your phone, etc. These are temporary. Once your apps are current, no problem. Heck, I had 50+ apps updating on my phone earlier this week, of course it drained the battery a bit. I don’t see any mention of other longer term problems, definitely nothing new.
Cycle your iPhone completely OFF then back on. Doing that usually solves all the problems with new OS upgrade battery problems by clearing out memory registers. I had an short term rapid battery run down after upgrading to iOS 11. I restarted my iPhone and the problem disappeared.