I think the Comments have made a few very salient points, but you might boil it down to just this:
exterior-durable species that I can afford 1.
In most places this will give you a shortlist of woods to select from, many of which will already be in use in commercial doors.
Possible additional factors in your choice worth highlighting include any concerns about carbon miles (typically, a few of the suitable woods are going to be tropical hardwoods), whether you want to use a natural or processed wood product (e.g. Accoya or similar), how exposed or sheltered the location is2 and somewhat tied to that what you hope/plan to finish the door with3.
1 This is especially relevant right now, as due to Covid-19 currently we're at the tail end of a global wood shortage, which saw prices rise to the highest ever seen in some cases (well over 300% increase over the previous year's prices).
2 Which compass direction it faces does have a bearing, as of course does whether there is any overhead protection from the elements. Very broadly speaking, the more exposed the situation the more you'd want to err on the side of a maximally durable species/product.
3 In terms of traditional finishes, paint being the most protective by far. Varnish is a definite step below this (even marine-quality, consumer-level exterior varnishes are a very distant second place in this category) and penetrating finishes trailing the pack.