In non-pilot speak; to avoid having someone noodling along at 120kts on a 12 mile final at big and busy airports it is common to assign 180kts to a 5-6 mile final then slow down to final approach speed which for both these aircraft is probably in the 130-140 kts range.
Everything would have worked fine as landing clearances are based on the assumption that pilots do as expected which is vacate the runway with expedience.
For whichever reason the ‘Dynasty’ did not fully cross the demarcation line between runway and taxiway so “legally” runway was occupied.