The TLS settings are not in scope of Salesforce package. These settings must be configured at the user's browser level. The user should examine the browser they are currently using.
For implementing TLS settings on a AWS S3 bucket, you can find guidance knowledge articles on AWS - https://repost.aws/knowledge-center/s3-enforce-modern-tls.
PS: View Drag, Drop & Upload Files to Amazon S3, a Salesforce AppExchange app for moving files from Salesforce to Amazon S3: https://appexchange.salesforce.com/appxListingDetail?listingId=a0N3000000B5ZPqEAN