Hello pyk76,
Currently, Apple is not rejecting applications that are submitted to the App Store for Reiview and distribution. There is no gaurentee that this window will last through November, but as of now you are able to submit your application for review and deploy to the App Store.
However, it would be a good idea to migrate off of UIWebView and onto an alternative as soon as possible as any one of the Apple iOS or iPadOS updates could drop support for the depricated API and cause for your mobile application to crash.
Hopefully this helps!