That which is not forbidden is not illegal I would expect so called conservatives to live and breath by that limited government principle. There is nothing in the UCMJ prohibiting reproductive health services same for USC code. It would take an act of Congress signed by the CIC to change the UCMJ and also an act of Congress signed by POTUS or a veto proof majority to change the USC code. The Hyde amendment only stops funding and it’s not that hard to eliminate the Hyde if the political will is there it’s a simple majority vote during the reconciliation process.
The ultimate lay of the Law is that the Constitution has to assign a right to fed.gov or fed.gov can't do it. So there is no authority for fed.gov to provide or to facilitate an abortion on fed.gov property or else where. That by no means is going to stop them from doing such things. It would be just another abuse in a long line of abuses.