Who I have the same questioned this topic

Samsung has released both a May and June security update for the S20 Ultra.  Verizon has not pushed these security releases (Sprint, T-Mobile, and AT&T have).  I'm worried about the security holes that are not patched.   When can we expect this update?

T-mobile pushed this update May 23rd:

https://www.tmonews.com/2020/05/t-mobile-galaxy-s20-plus-ultra-may-security-update/