The sequence setting that I have used for Instagram Reels are mentioned below:
- File -> New -> Sequence.. (Ctrl +N)
- Under Available Preset Select Digital SLR -> 1080p -> DSLR 1080p30 (DONOT click Okay or hit Enter)
- While selecting the above option go to Settings
4. Under Video Section change Frame Size to 640 Horizontal and 1136 Vertical (Do not change anything else)
5. Keep all the Settings as it is.
6. You can even Save this Preset for Future use.
For Video on how to create Instagram Stories and IGTV Sequence in Premiere Pro 2020 Check out my Channel