My first instinct was Queer too, but after looking it's not the same: https://www.amazon.com/Queer-Pride-Flag-Sleeves-Grommets/dp/B082GGCZWG
Are the black bars a part of the flag? Or is it just a cropping thing?
Also where did you see this flag?
That looks like the queer flag to me, just upside down. They are unfortunately similar in design, but not the same.
https://www.amazon.com/dp/B082GGCZWG/ref=cm_sw_r_cp_apa_glc_fabc_0XQJEXF0V3FSKSY123EF
I haven't heard of that one before.
I did some research. "Sapphere" is a brand name. (https://www.amazon.de/-/en/Sapphere-Queer-Pride-Flag-Sleeves/dp/B082GGCZWG) It's not a sexuality or gender identity. It's just the name of the company that makes and sells this particular flag.
And this particular flag is a queer pride flag. It's not the LGBT+ rainbow flag. It's not the Progress Pride flag. It's a flag for queer people (which doesn't include me, for example - because I might be a gay man but I'm not queer).
So, if queer is your thing, this might be your flag. But it's not everyone's flag.
https://www.amazon.com/Queer-Pride-Flag-Sleeves-Grommets/dp/B082GGCZWG Actually is this one (Sorry for the random link, was in a rush)
the queer pride flag
https://www.amazon.com/Queer-Pride-Flag-Sleeves-Grommets/dp/B082GGCZWG
https://www.redbubble.com/i/tote-bag/Queer-Pride-Flag-by-breadchoi/30726471.PJQVX
https://www.google.com/url?sa=i&source=web&cd=&ved=2ahUKEwic6PfJwJPsAhVrl3IEHbsYAREQjhx6BAgBEAI&url=https%3A%2F%2Fwww.reddit.com%2Fr%2FQueerVexillology%2Fcomments%2Fcvs468%2Fqueer_pride_flag_concept_lavender_chevrons%2F&psig=AO... there are a couple designs, here are some of the most popular ones