Will windows 11 support all 7th gen CPUs

mohith1402  "Can you reply please tell me where to address this issue if I contact Microsoft support some say that 7th gen incompatible some say all the 7th gen are compatible please wait for windows public release but it seems like they are not going to add any CPUs in coming days"

As an alternative to running around chasing your own tail, you can wait and see what Microsoft does  when it does whatever it does.  Although Microsoft often changes course in unexpected ways, current Microsoft documents (see above comments) support your supposition that "it seems like they are not going to add any CPUs in coming days", so I think you can take that option off the table.   

At present, Microsoft supports a few 7th Gen X-series processors for Windows 11.  Microsoft might expand support to more 7th Gen processors in the future, but it might not because there are significant security differences (related to the Spectre and Meltdown vulnerabilities, among other things) between 7th Gen and 8th Gen (and subsequent).  The architecture differences between the generations seems to be what is driving the line drawn between 7th Gen and 8th Gen. 

You will not find an answer in this forum, because this forum addresses Microsoft Edge issues, not Windows issues.   I suggested earlier that you might find better information in the https://answers.microsoft.com/en-us/windows/forum/windows_11?sort=LastReplyDate&dir=Desc&tab=All&status=all&mod=&modAge=&advFil=&postedAfter=&postedBefore=&threadType=All&isFilterExpanded=false&page=1 but I doubt it.  I did a search within that forum this morning and found no information of any value.