I have cleared cache on both servers with latest Webmin version 2.011 and Authentic Theme 20.11.1:2
Even cleared cache all pc browsers with bitbleach
One server is Pro and the other GPL both with Ubuntu 22.04.1
Still no Terminal
Edit to Add:
I have Webmin 2.011 and Authentic Theme 20.11.1:4 on a Almalinux 9.1 vps without Virtualmin and can confirm that the Terminal Link is there and working.