Samsung has issued yet another fix to address the Galaxy S20 FE's touchscreen issues. Some users have reported that the update only partially addresses the problem, with some touchscreen functions not working as intended. The defect is likely due to faulty hardware, as multiple updates have failed to mend it.
https://www.notebookcheck.net/Samsung-Galaxy-S20-FE-touchscreen-issues-might-not-be-fixable-via-software-updates.503354.0.html