Only able to open OpenRCT2 title sequences

[MirandaStreeter]

I have both RCT1 and RCT2 assets available:

And the title sequences are available:

And I can confirm that when I select, for example, RCT1 for my title sequences it runs through those.

And in the "Title Sequences" menu I can see all available options:

And in the add/load menu the ORCT2 parks are available:

But none of the RCT1/2 sequence maps show up:

Is there perhaps a certain requirement I'm not meeting? Or is this a technical limitation with how ORCT2 formats and ingests the maps?

[IntelOrca]

I don't think the original sequences could ever be edited because they are special cases which reference the original parks but don't actually include them in the .titleseq.