Yes indeed, for the season 23/24 there is little to no information from the Belgian football association on Pro League A. ( Probably because they don't want to set things in stone yet and tweak some minor stuff)
But from the official site of the Pro League: https://www.proleague.be/nl/pl/news/pro-league-legt-stevige-fundamenten-voor-het-belgisch-profvoetbal comes the statement:
"De Kampioenen Play-off zal afgewerkt worden met de 6 hoogst gerangschikte teams, die strijden om de titel. De Europa Play-off wordt door de nummers 7 tot 12 gespeeld, waarbij de winnaar van deze play-off het opneemt tegen de 4de uit de Kampioenen Play-off voor het laatste Europees ticket."
Which means:
"The Champions Play-off will be completed with the 6 highest ranked teams competing for the title. The Europe Play-off will be played by the numbers 7 to 12, with the winner of this play-off taking on the 4th out the Champions Play-off for the last European ticket."
So at this moment they have agreed the play a 'final' between the 1st of the Europe Play-Off and 4th of the Champions Play-Off but haven't put it in the rules yet.