Jfb - I know the basic principles are to give food in biggish pieces they can easily manage.
Archie like steamed green beans.
Other veg people do are batons of steamed carrot, potato. Bake some potato for her in wedges.
Broccoli or cauliflower are good steamed and have little handles.
I haven't done a heap of veg yet, silly me.
I cook up meatballs and Archie will eat those. Zucchini slice. Little sandwiches. Today I made sandwiches with chopped up chicken and mayo. He loved them.