HDR video is more and more popular now. LRTimelapse support Rec.2020 gamut, but transfer function still Rec.709. This is good to show it on both SDR and HDR displays because the picture looks just the same like in Lightroom. But for HDR video editing, it's difficult to process in video editing software like Davinci Resolve. There is no option of Rec.2020 wide gamut with Rec.709 transfer function. I have to use intermediate tiff files in Davinci Resolve to solve this problem. Could it possible to add a Rec.709 or ST2084(PQ) transfer function options on rendering output?

Sorry, I don't really understand. Did you try to do the export via Lightroom (will create Rec.2020 intermediaries) and then render in LRTImelapse in Rec.2020 also? This should give you footage that you can process in a color managed Davinci Resolve workflow.
See this faq: https://forum.lrtimelapse.com/Thread-dav...s-with-lrt

Thank you for your reply. It's good now when I set Clip Attributes Data Levels to Full.