“In Review” means the review has started, unlike “Waiting for Review,” which means it hasn't started yet. Apple says its target is to review 90% of submissions in under 48 hours, but some reviews take longer; that target isn't a deadline. Nearly two weeks in In Review is long enough that I'd ask Apple directly for a status update.
Use the submission's App Review page in App Store Connect and contact App Review about this specific version. Include the app name, version/build, submission date, and any existing support case number. Check the Resolution Center too, in case they are waiting for information. A public forum can't see the review queue or get an individual app escalated. Apple's contact steps are here: https://developer.apple.com/help/app-review/after-submitting-for-review/contact-app-review/ and the status guide is here: https://developer.apple.com/help/app-review/after-submitting-for-review/review-status/
Topic:
App Store Distribution & Marketing
SubTopic:
App Review