The RYR aircraft seem to be getting airborne in around 1,250m of the 1,799m TODA, although I wouldn't like to guess how far along the runway they reach screen height. If they are carrying out a de-rated departure I assume they should become airborne at roughly the same point on the runway each time (?). That certainly seemed to the case with the Flybe E195s which also used de-rated power at SEN.
I believe the 737 MAX 9 has the SFP package as a production standard but I don't know the percentage of 737-800s have it. Obviously it would be only from later production runs as a factory option and I don't know if it's offered as a modification on earlier aircraft.