Caption Export File Formats (more options needed)

You are correct that PR has no caption export format for Subtitle format captions that contain positioning. The only current options are to use one of the closed captions (e.g. EBU), exporting .xml or .stl. You may be able to convert to another format from there.

There has been the most support for .vtt as an alternative.

https://community.adobe.com/t5/premiere-pro-ideas/export-captions-as-vtt-webvtt-files/idi-p/13515926

The @Francis-Crossman17221443 post he refers to is pinned to the top of that thread.

This request was ported from the old UserVoice system, and that is why the 1/24/23 date appears for all of the earlier entries.

I posted just after the porting:

https://community.adobe.com/t5/premiere-pro-ideas/export-captions-as-vtt-webvtt-files/idc-p/13542214#M7500

The post by @TeresaDemel still has an active link to a survey on .vtt support. Teresa, do you still want responses?

Some users are asking for .vtt even if it does not include positioning - which would not help you. My relevant response is here:

https://community.adobe.com/t5/premiere-pro-ideas/export-captions-as-vtt-webvtt-files/idc-p/14162179#M11439

Stan