New Balance do wide fit and extra wide fit in some styles.
Birkenstock “regular” fit is actually wide fit. I find ones where the sole and upper are slightly different colours work best. All the same colour or dark upper/white sole can really emphasise the slightly different shape.
Sargasso and Grey only do wide fit shoes and have trainers, old school kinda looking.
Dune, River Island, Moda in Pelle and ASOS have a reasonable wide fit selection which often includes trainers. If you want knit style trainers River Island are worth a shout.
Converse do wide fit in some styles, IIRC you can get them from ASOS.
Some of the specialist running brands (Hoka, Brooks, Altra etc) either do wide fits or their styles have wide toe boxes so will often work for wide fit feet. Specialist running shops will often be able to tell which brands and styles to try, like so
https://www.northernrunner.com/shoes-c133/running-shoes-for-wide-feet-c1390
Allbirds are pretty forgiving in style/fit.
Grenson is worth a look as most if not all of their women’s trainers are E width.
Also depending on your size, considering trying boy’s trainers as male and female trainers often come with a different width/length ratio, so male
standard width trainers often equivalent to wide fit in women. It varies from brand to brand how they do this in practice this so you’d need to actually try on to check.