FET 1 vs 2 embryos?

Second round of IVF, we have 3 PGT tested embryos left. First transfer failed this week. (I have 1.5yo son from my first IVF cycle that produced 1 PGT normal.)

I’m very tempted to transfer 2 embryos for our next try. I am 35 and would love to have all 3 if they make it to live birth… I know that’s wishful thinking. I am wondering if anyone has experience and insight with 1 vs 2? Are they more likely to both fail if I transfer them together? I wonder if they both fail, would this have saved me some time in a way bc maybe they would have failed on their own anyway? Or would I be better off trying to transfer each 1 at a time? (I will contact my clinic too, just curious what others have done).