How to get version from apk name in github release?

[SubhashBose]

I have multiple apks in each github release, like this name format

AppA-11.22.33-name.apk
AppB-45.66.77-name.apk

Everything works fine, I can get the latest release, filter 'AppA' to get the correct apk. But I can not get the app version from it. I expect regex for version [0-9]+\.[0-9]+\.[0-9]+ to match, but it does not. It seems regex only applied to url/release-tag, but not on apk name. How can I apply regex on apk name to extract the version?

Thanks