I wouldn't get too hung up on eating the same thing at the same time yet. That works better once they are at school (or at least nursery). Up until about 4 (or even 5 really) you have to be ruled by their energy levels because trying to do anything with a knackered toddler is just an exercise in extreme patience testing. You can always save a portion of your own tea to give her the next day.
I would always do an earlyish tea and try to have it at a consistent time. I think this is the most helpful thing. Then experiment with format - DS2 at the moment likes feeding himself, but only with a spoon or fork, which means he either needs fairly liquid foods which are sticky, like porridge, or baby food jars (
) or some kind of thick sauce mixed with rice or cut-up spaghetti, or he needs things which are the right combination of soft enough to spear with a plastic fork and firm enough not to fall apart when on the fork. Frankly I do not have the energy every night to assist him with the forking so sticky usually wins out. But at other times, a picky format he can self finger feed, or something I can spoon feed him have been winners. Because they go through phases of this and can change at any time it's quite useful to have a back up option or part of the meal - something like breadsticks for self feeding, baked beans for self spoon feeding or yoghurt for you feeding.
If an early tea leaves her hungry before bed you can always do a "supper" of things like porridge or picky foods or whatever she likes to see her through the night.
Also I would check she is not in pain with molars coming through, some calpol half an hour before dinner might help.
Joe Wicks has no qualifications in child development or psychology, so I wouldn't worry about anything he has to say on the matter.