Yes, the gist of what she says seems quite reasonable, but the way she presents it is not.

She acts like she and gender speshuls like her are the only people on earth who have the faintest clue about sex. She assumes that everyone "cis" ascribes to a simplistic, Victorian-era view of sex that defines sex as het PIV only.

Her viewpoint overlooks, ignores and erases the history of sex, sex research, sex education and the various sexual liberation movements of the 20th century, including gay and lesbian liberation. It's like she's never heard of Masters & Johnson, Alfred Kinsey, Mary Calderone & SIECUS, "The Joy of Sex," Eve's Garden, Shere Hite and "The Hite Report" or has any idea of what happened in the 1960s, 70s and 80s. Or the 1920s and 30s.

While she's holding herself out as an expert about sex, and "cis" ideas about sex specifically, I suspect she's spent zero time finding out what people in the demographic categories she so disdains actually do believe by interviewing and listening to them. Coz she clearly sees "cis" people as a bunch of ignoramuses who are far beneath her.

She also seems to assume that all sex involves "dominant and submissive roles" - there's no room for the mutuality that was championed and considered the norm for earlier generations.

And her preachy, finger-wagging tone is very off-putting. This is what she says:

So, here’s what I want cis people to understand:

Sex doesn’t always equal penetration.

People can fulfill different dominant and submissive roles, no matter their gender identity.

Orgasm from one partner doesn’t mark the end of sex, and not everyone has to orgasm to have a good time.

To help cis people unlearn these damaging scripts, I’d suggest watching queer porn. Some of my favorites that feature trans and nonbinary bodies and voices are Crashpad Series, Bellesa, and AORTA Films

Sorry, people have known the supposed "secret truths" about sex that she "reveals" in her piece for generations. Her own presumably "cis" parents probably knew this before they conceived her. And they/we somehow managed to learn this without watching "queer porn" - or, in many cases, any porn at all!