To be technical, SBS actually has 10 channels if you include the four radio services (SBS Radio 1, 2, 3 and SBS Arabic24) but of course those streams are only 128kbps each IIRC.
RACING.COM is a MPEG4 SD channel.
7Flix was in MPEG4 SD channel at launch, but changed to MPEG2 (complete with a “Now Available on More TVs” promotional campaign) shortly after the demise of 4ME in mid-2016.
Obviously Seven (SD), 7TWO and 7mate are in MPEG2 SD.