Question about Samsung EP-TA800

I can't answer that. We use it to charge a Samsung S 21 fe and it works great.
According to Google, the s23 should also allow 25 watts charging - should also fit.

Unfortunately, I can't tell you

Hi, I don't know about the s23 but my Fold 5 charges in Super fast mode with it.

Unfortunately, I can't tell you. I use the charger for a wireless charger with an iPhone.