Where can I find a list of known bugs in iOS 16.7.1

Perhaps to view the following article content to see

what has been already fixed in the old-version first?

There are CVE items listed where change occurred.

About the security content of iOS 16.7.1 and iPadOS 16.7.1 - Apple Support

//support.apple.com/en-us/HT213972

The 'parent article' offers wider swath of details to review.

Apple security releases - Apple Support

//support.apple.com/en-us/HT201222

The newer article also appears, with corrections added

when necessary; maybe your issue was resolved by now?

About the security content of iOS 16.7.2 and iPadOS 16.7.2 - Apple Support

//support.apple.com/en-us/HT213981

And the most recent iOS security was addressed for newer

products by last current update iOS17.1 ~Or later, if offered?

About the security content of iOS 17.1 and iPadOS 17.1 - Apple Support

//support.apple.com/en-us/HT213982

Also "Rapid Security Responses" may (or not) have been offered

to the specific product, installed at some point; given odd-order

number sequence that might have made no sense?

Your question might be asked in Apple Developer section, if need be.

The meanings may vary ~ across options in published detail online.

"Rapid Security Responses" deliver important security improvements

between software updates and are available only for the latest versions

of iOS, iPadOS, and macOS. ~ Learn more about Rapid Security Responses. 

Apple security documents reference vulnerabilities by CVE-ID when possible.

"If you believe that you've discovered a security or privacy vulnerability

in an Apple product, learn how to submit your research."