Here’s the text of the second clause of Section 3 of Article IV:
“The Congress shall have Power to dispose of and make all needful Rules and Regulations respecting the Territory or other Property belonging to the United States; and nothing in this Constitution shall be so construed as to Prejudice any Claims of the United States, or of any particular State.”
When States were formed from “Territory...belonging to the United States”, the Congress, as recorded in the Enabling Acts for particular States, Congress was not required to nor did it necessarily give all the land within the new States to the newly admitted States.
For those who want to “give the land back to the States”, you can’t give them back something they never had.
(I won’t necessarily be ignoring you, I just have to leave the house now.)
To be continued.