I tend to export excel sheets to markdown pretty often, and whenever i paste sheets that are too wide they will not show up on the preview mode. They cut off right at the end, as far as the preview canva will allow.
Correct, i usually just copy paste them in. The formatting seems to be fine. But I would need to test how it would look with tables that go too big.
Realistically, i doubt one would be able to paste a giant table in a pdf. But a shrinked version of a medium table could work? No idea if implementable.