I havent done much reading but 190m LPH seemed to have a commercial slow-going hull form highly resembling a bulker. Especially the bow form, beam and draft. It makes sense because prior to that US/UK had derived some FOB designs to supply deployed forces and fleets which was based on commercial ships.I did some reading, and it's turned out that LPH 190 m is not based on Star 50 bulk carrier. It was just misinterpretation (by online medias) of the premise that since Star 50 bulk carrier (189 m long) can be built by PT PAL, a ship as large as 190 m LPH can be built at PAL too (need to remind you the largest naval ship made by PAL is around 125 m long, so it is tempting for online medias to compare it with Star 50).
Mandala's statement would make more sense. They would have designed the 190 m and 244 m LPH based on the knowledge gained during the construction of Makassar LPD, but not necessarily based on Makassar LPD.
To be honest experience gained from a small LPD wouldn't help towards a large flat top LHD / LPH. It would be vice-versa. They need some interim experience or assistance before stepping into the flat top league.
And as other members have outlined too, had better they spend sources on other designs which is needed more at the moment.