Selecting specific frame range to process in V3.0

Finally updated to 3.0 and one of the features that seems to be missing/deemed obsolete was selecting a specific frame range to process. Now I can only select the time and trim the video. For a slower GPU trying to do a 4k upscale of a 2-hour video would take days so I would normally process frame 1-8000, then 8001-16000 etc. While this was going on I could batch edit/correct the first set in photoshop on a second PC and easily recombine all the images in FFMPEG in the correct order and the audio would be perfectly synced - I’ve been seeing some dropped frames around the selected trim range in 3.0.

Any way of bringing this feature back w/out rollback?