yes, if they have more. As I said I have not seen a case yet where they had one delimiter and it did not work as a decimal too. Might be coincidence, might be because whoever uses it is smart enough to avoid that confusion
It's just as common with a single delimiter. Here's a couple quick examples
Mac OSX: https://en.m.wikipedia.org/wiki/MacOS_version_history
Gimp: https://www.gimp.org/release-notes/gimp-2.10.html
Red Hat Linux: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/5/