The md() function

Use exibble to create a gt table. When adding a title, use the md() helper to use Markdown formatting.

exibble |>
  dplyr::select(currency, char) |>
  gt() |>
  tab_header(title = md("Using *Markdown*"))

Using Markdown
currency	char
49.950	apricot
17.950	banana
1.390	coconut
65100.000	durian
1325.810	NA
13.255	fig
NA	grapefruit
0.440	honeydew