Our engineering team is aware of this and has looked into the impact of the recent changes to Airtable attachments and they found it's not affecting our extensions (except for one). The way attachment URLs are handled in miniExtensions views and forms assures that they will continue to work, even though these links are being accessed publicly.
For example, miniExtensions Portal users will continue to be able to use, display and upload attachments to attachment fields in the portal.
We don't store the attachment URLs (or any other records). We fetch your data from Airtable API in real-time.
One possible edge case is if a visitor stays on the extension page for more than 2 hours, they might not be able to enlarge or download an attachment without refreshing the page first.