I still have 6.18, no other ones say LTS???
The next LTS will (probably) be 7.3, but right now, 6.18 is still the most recent LTS.
The Linux Kernel Archive – Active Kernel Releases
Longterm
There are usually several “longterm maintenance” kernel releases provided for the purposes of backporting bugfixes for older kernel trees. Only important bugfixes are applied to such kernels and they don’t usually see very frequent releases, especially for older trees.Distribution kernels
Many Linux distributions provide their own “longterm maintenance” kernels that may or may not be based on those maintained by kernel developers. These kernel releases are not hosted at kernel.org and kernel developers can provide no support for them.
It is easy to tell if you are running a distribution kernel. Unless you downloaded, compiled and installed your own version of kernel from kernel.org, you are running a distribution kernel
What is the next longterm release going to be?
Longterm kernels are picked based on various factors – major new features, popular commercial distribution needs, device manufacturer demand, maintainer workload and availability, etc. You can roughly estimate when the new longterm version will become available based on how much time has elapsed since the last longterm version was chosen.
6.18 it’s fine for your scope. Wait for the next LTS as @Aragorn indicated