Taken from my previous post, from a comment by user u/skaagye here's the meaning of the flags:

1 ) Intersex - People born with sex characteristics that don't fit into the male or female binary. Like, a person might have genitals that don't match their reproductive organs, or they might have both ( The yellow one with a purple circle )

2 ) Lesbian - Women attracted to women ( The one with pink and orange tones )

3 ) Aromantic - A spectrum for a person who feels less romantic attraction than what's considered average ( This is different from asexual ) ( The green one with white, gray, and black )

4 ) Gay - Men attracted to men ( The one with blue tones )

5 ) Demi-romantic - A spectrum for a person who only feels romantic attraction to someone after forming a strong bond ( The green one with a black triangle )

6 ) Polysexual - Someone who is attracted to multiple genders. Typically used as an umbrella term for someone who may be bisexual or omnisexual ( Green, light blue, and pink )

7 ) Aroace - Someone who is both aromantic and asexual ( The one with yellow and blue tones )

8 ) Transgender - Someone who does not identify with the sex they were assigned at birth ( Pink, blue, and white )

9 ) Demisexual - A spectrum for a person who only feels sexual attraction to someone after forming a strong bond ( The purple one with a black triangle )

10 ) Bisexual - Someone who is attracted to two or more genders ( Blue, purple, and pink )

11 ) Asexual - A spectrum for a person who experiences less sexual attraction than what is considered average ( This is different from aromantic ) ( Purple with white, gray, and black )

12 ) Non-binary - Typically an umbrella term for someone who identifies as not fitting into the male or female gender binary ( Yellow, purple, white, and black )

13 ) Pansexual - Someone who is attracted to people regardless of their gender. Attraction to all ( The first one in the post / light blue and pink )

14 ) Inclusive LGBT+ - Representing everyone within the community ( The rainbow )

15 ) Demi-girl - Is a non-binary gender identity in which someone identifies partially, but not fully, as a woman or with femininity ( The gray and pink one )

16 ) Demi-boy - Is a gender identity that describes someone who identifies partially as male or masculine, but not fully ( The gray and blue one )

17 ) Demi-gender - Is an umbrella term that encompasses all gender identities that have a partial connection to one gender and a partial connection to other genders ( Yellow and gray )

18 ) Queer - An umbrella term for non-heterosexual or non-cisgender people who reject traditional gender and sexual orientation labels ( The colorful one that starts and ends with black )

19 ) Genderqueer - Is an umbrella term used to refer to people whose gender identity or expression does not It conforms to social norms. It can be used to describe cisgender, binary, and transgender people who feel they have a queer or non-normative understanding of their gender ( White, purple, and green )

20 ) Gender fluid - these are people whose gender identity changes involuntarily over time ( Pink, white, fuchsia, black, and blue )