You can make a constitutional amendment if you'd like. You have over two dozen of them.
We already have the 9th and the 14th, which protect rights such as abortion (or at least, used to, until this religiously drive court allowed personal opinions to take priority over impartiality). It is nonsensical to suggest an individual amendment for every single specific right.
You think interracial marriage isn't included in the constitution?
You think it is? Show me where. This is why we needed rulings like
Loving, which interestingly Thomas left out of his crosshairs despite being based on the exact same reasoning as
Griswold,
Lawrence, and
Obergefell. I wonder why?

Where is abortion outlined in the constitution?
As I said above, it is (or rather now, should be) protected by the 9th and 14th Amendments.
If you want to say that any right which did not exist in 18th century Philadelphia is not worth having, then go ahead. But at least be honest that you have no issue with stripping vast numbers of rights away from vast numbers of people.
If they were Muslims, the females of Texas would be wearing a Burka.
Don't forget the Supreme Court also ruled this week that public money can be handed to religious schools. What happened to separation of church and state?
All that is just politics and usually would be just part of the great game, but this time is going to affect the most deprived sectors of the population, and, as I said before, it will tell the "haves" (have enough for a plane ticket to another state) and the "have nots" - have not other option than risking their lives in a dark alley getting a hanger inserted into their vaginas or live with a bad decision for the rest of their lives.
Working as intended. All the evidence from around the world shows that outlawing abortion doesn't stop abortion, and countries with restrictive abortion laws have similar rates of abortion to countries with legal abortion. The only thing that changes is the safety of those abortions. Republican senators will still be able to afford
for their mistresses to get safe abortions, and they don't care in the slightest about poor people.