Well, since seats in the House are based upon both citizens and non-citizens, it would not change that at all.
What makes you think it includes or should include both? These people aren’t citizens and can be deported at any time meaning their presence here is strictly a failure of the government to remove them. Why would they deserve to have representation in the same government that has the legal standing to deport them?
It includes both because the Constitution says it does.
Also, the Fed Govt says it includes both.
Congressional Apportionment - Frequently Asked Questions - People and Households - U.S. Census Bureau
Who is included in the apportionment population counts?
The apportionment calculation is based upon the
total resident population (citizens and non-citizens) of the 50 states. In the 2010 Census, the apportionment population also includes U.S. Armed Forces personnel and federal civilian employees stationed outside the United States (and their dependents living with them) that can be allocated, based on administrative records, back to a home state.