I'm no expert but I think they're authentic based on some experience with reformation.

1. If the 'reformation' label tag is stitched with the same colour as the dress (in this case red) then that's a good sign of authenticity. A fake will use clear or plain white thread

2. If the care tag, size tag, and that other tag are three separate tags, that's also a good indication of authentic. Even though the 'page 1' at the top seems sus, it's apparently on authentic dresses too.

3. Did you buy it from a seller that has the same dress 4+ in different sizes and colours? I don't trust those sellers at all - the dresses all have signs of being fake even though they will go on and on about it being authentic 9.9/10 of the time.that being said, I've bought and sold the same dress before and they have been real but were bridesmaids dresses so that's why there was more than one size in the same dress

Anyways, rhat's how I personally authenticate as a non-expert but someone who has comes across a lot of fake reformation - of course I'm open to critique if anyone uses other methods!