Is there any way to download apps on windows 10 mobile that are not available anymore?

I have downloaded a few apps on windows 10 mobile previously, I would like to re install them. Is there anyway this can be done? one of which is Garmin mobile connect. I had this on my phone previously. I went in to look today, and it was not available for my laptop. Is it still available on my phone when I get it?

 

Is this what you want.

https://www.windowslatest.com/2017/08/28/sideload-apps-in-windows-10-mobile/

 

I am not sure, they (garmin) had the app on the app store, it's still listed but I cannot download it. I am sort of stuck on what to do. Thanks for the information!

 

Unfortunately on Windows phone things are more complicated than on android, on android you simply download the apk from some third party hosting website and install it. But apparently on windows phone due to security policy of MS you have to have it unlocked as developer phone with a developer account. On top of which i think there is a limit of how many apps .xap you can port as well.