Thank you FAb7D especially for merge 2083 version that is the latest.
For snap, I saw it too, but installation might be unsafe (?):
error: This revision of snap "sublime-merge" was published using classic confinement and thus may
perform arbitrary system changes outside of the security sandbox that snaps are usually
confined to, which may put your system at risk.
If you understand and want to proceed repeat the command including --classic.
As I am not sure of the security implications related to the usage of --classic option, I prefered not to use snap.
I will use sublime-text from third-party repo and sublime-merge from flatpak or meld if it feats my needs/expectations. Thanks again.