I used my SSAN card I was issued in the 60s as well as my original “official” record of birth (it actually says this on it). Have lost my DD214, but had other, listed documents that satisfied the state bureaucrats.
I had a folder of documents to prove who I was, also had a state issued ID as well as a Fed issued ID.
I had no problem getting my RealID.
BTW, you can write to get an official copy of your DD214. I noticed on the web some records were burning in a fire and mine fit the affected dates.
I found an address on the web and went to the site and found out how to get copies. I have TWO DD214s. One from a short and reup and the second from the second enlistment. Got both of them.
You can also get copies of your BC from your states DNR (I think). Did that too. I also got a copy of my SS card. I hated the process but it is still doable.
I got my RealID quickly because I read the instructions and requirements and had all the stuff needed. Easy.
Ebenefits.gov is the VA web portal. If you have enough data to vet yourself you can download just about all the records of your military service. Once you get an account you can instantly download service letters. DD-214s can also be downloaded, but take up to a day for the request to go through. I have a reasonably recent (10 years old) recently record and can usually pull anything out of my record within 2 hours.
To get a replacement DD-214 go to National Archives and Records Administration at:
https://www.archives.gov/veterans
Someone advised me to have my DD214's recorded at the county seat. I did and I am glad I did. They used to do it free now there is a big fee where I live.