Why site linking domain and backlink are differing.

[moz12pro]

My site https://www.planmymoment.com and Mobile version site https://www.planmymoment.com/?amp Why my desktop and mobile version site linking domain and backlink are differing.

[GPainter]

Hello,

In reality they are not, the ?amp is just a query its also where canonical tags become important.  You could link to planmymoment.com?testing the 'value' would still go to your main domain assuming you have canonical tags on. Now obviously the link would still 'look' like its going to a different place but the canonical tag would tell e.g. Google the original content is the homepage.

Hope that makes sense, the short version is there is nothing to worry about.