Last time I checked (pre Covid) 127.750 was a final approach sector, basically covering around the last 15nm on the approach 5000 and below.
These were the typical pre Covid Orlando TRACON configurations for KMCO traffic. (I have not checked them lately so might be changes ?).
Config 1 (overnight)
124.800 - all departures and arrivals
Config 2 (transition)
124.800 - all departures and arrivals
127.750 - arrivals final
Config 3
124.800 - departures and arrivals east
120.150 - departures and arrivals west
127.750 - arrivals final
Config 4
124.800 - departures east
120.150 - departures west
128.375 - arrivals east and west
127.750 - arrivals final east and west
Config 5
124.800 - departures east
120.150 - departures west
128.375 - arrivals east and west
127.750 - arrivals final east
123.850 - arrivals final west
Config 6 (transition)
124.800 - departures east
120.150 - departures west
128.375 - arrivals east
134.050 - arrivals west
127.750 - arrivals final east and west
Config 7 (full)
124.800 - departures east
120.150 - departures west
128.375 - arrivals east
134.050 - arrivals west
127.750 - arrivals final east
123.850 - arrivals final west
123.850 and 134.050 are not covered by LiveATC.