You’re not alone...
This is bug of which we are seeing frequent reports in the Support Community. At present, there is no fix or lasting workaround for this issue. The issue of inconsistent scaling/sizing of Home Screen App/Folder icons also extends to the new-style Widgets - whilst the old style Widgets are seemingly unaffected by this bug. Some have also reportedly seen the issue affecting App icons within the Dock.
As Apple engineering do not or review any posts to this site, please report the issue as a bug using this Apple iPad Feedback Page:
https://www.apple.com/feedback/ipad.htm
When submitting the report, ensure that you include details of your iPad model and installed version of iPadOS in the body of the report. The drop-down menu doesn’t yet include iPadOS 13.7 or 14.0.
Please do not rely upon others submitting this issue to Apple. History demonstrates that only those bugs for which sufficient reports are received will be assigned priority for remediation.