… after several rescans (edit the multiplex Scan status to PEND or ACTIVE) the info got populated, e.g. for mentioned CT 24:
0x0906 / 2310 PCR
0x08fc / 2300 PMT
1 0x0852 / 2130 TELETEXT
2 0x0906 / 2310 HEVC
3 0x0910 / 2320 AAC-LATM cze
4 0x0911 / 2321 AAC-LATM qaa
5 0x0913 / 2323 AAC-LATM cze
6 0x092e / 2350 DVBSUB cze
7 0x0938 / 2360 HBBTV
and then the mapping worked.
(Not sure what was the problem; even tried to set mux Guard Interval manually to 19/128 as it was reported to have been changed from 1/8 some (quite long) time ago, but did not help; it worked somehow randomly after another retry with default settings, mostly AUTO)