Do you mean within dandelions specifically? Technically yes; the original description of each species will probably say if it’s sexual or asexual, and other sources may as well, it’s been a while since I’ve read through identification guides or taxonomy papers on it. My understanding is that generally the asexual populations are weedier than the sexual ones, so the sexual ones will tend to be more restricted to certain areas of Europe whereas asexual ones can be much more widespread and will be the ones that make it to North America. So I think you can assume that weedy non-native dandelions are apomictic.
There are complexes containing apomictic populations in a variety of other plant taxa as well, including raspberries, buttercups, hawkweeds, hawthorns… They have similar taxonomical issues, in most cases observations in those complexes are not identified past complex (many of my observations of those genera are stuck at genus).
This is the most thorough collection of resources for identifying them past section, for British species: Dandelions – Botanical Society of Britain & Ireland (bsbi.org)
In this video the leading British authority goes through around 30 sample dandelions and explains their identification.
If you haven’t read the BC paper yet that might clarify, but absolutely you’d expect many species in a state and quite a few in one town, depending on the variability of the habitat. For example in BC you get more sections represented near the coast and further north, whereas in inland urban areas it’s mostly just sect. Taraxacum. So I expect here in Ontario we’d have significantly less diversity because we don’t have coastal or alpine habitats. A lot of dandelion diversity comes from coastal and alpine habitats in Scandinavia, northern Europe, the Mediterranean etc.