No PNG4 24-bit image sequence option in Toon Boom Harmony 21 Premium?

I need to export an image sequence with a 24-bit depth. I remember I could do it with a PNG4 format in previous versions of Toon Boom but I can’t find neither PNG4, nor 24-bit option in 21 Premium. Is that just not an option anymore or was it renamed?

I don’t remember 24bit, but I did go through the docs for some older versions of Harmony. 16bit was I highest I could see.