So far as my nowledge goes you can offline install store downloads but its very difficult in my opinion. Also on LTSB 2016 but I used the installer of the xbox app and store that can be found here on the forum.
@abbodi1406 When we paste the url in adguard's site, it gives me 3 appxBundle for same app. Especially for Word, Excel. How do we get to choose the right one which is x64? I downloaded one randomly from the three and Windows complained that it was not the right one for my PC. All the file names are same with no mention of x86 or x64 or arm64. Just different file sizes and different SHA-1s.
It might help to mention what app or productid you used i checked category id 0e639757-dc24-4e5b-9b33-226f71dcd952, and i can see 1 appxbundle per version for each product