World of EUC

Yes, that's how I understand it.  1912 (latest CU) first, then 2203.  Watch your OS and Database versions as they aren't all compatible with each iteration.

Further info on this with relevant links:
7.18 is not mentioned as a direct upgrade path for 2203 <https://docs.citrix.com/en-us/citrix-virtual-apps-desktops/2203-ltsr/upgrade-migrate.html#versions-you-can-upgrade|here> (7.18 is EOL and not considered a support CR). 1912 however, is listed as a direct upgrade path.

7.18 is listed as an upgrade path for 1912 <https://docs.citrix.com/en-us/citrix-virtual-apps-desktops/1912-ltsr/upgrade-migrate.html#versions-you-can-upgrade|here>.

TLDR; 7.18 -&gt; 1912 -&gt; 2203