Can the Attorney for the plaintiff make themselves a witness?

Best of my knowage, no. The attorney is there to argue the case in favour of the plantiff, and to question witnesses on that grounds.

But I’m not a lawyer, so I could be wrong.

That sounds more like the submission of evidence than testifying, and I think it is perfectly reasonable for the attorney to have that piece of evidence.

@WestRiverrat I think you “hit the nail on the head.” The lawyer is not testifying, only submitting Exhibit A.

Borderlines conflict of interest. I would check that part out.

@john65pennington If I read the OP’s question correct, I interpret that the Plaintiff’s lawyer served a document on the defendant. i.e. Wife serves husband with divorce paper, the lawyer is only declaring the papers were served.