I'm not more informed. But I can't tell my friends they are men not women. Or rather men not transwomen. That's all
I'm not asking you to. Are your trans friends willing to accept that a female beautician who is only trained in and has experience of waxing the pubic hair growing in the vicinity of a vulva is entitled to refuse to was the pubic hair growing in the vicinity of a penis and scrotum? And to refuse to touch the penis and testicles?
Not being familiar with beauty salons, I thought they just did all kinds of waxing, arms, vulvae, chins, scrota etc
I expect some do, some don't. I don't use them but I know one salon who definitely does not offer massages or waxing to men. Some barbers don't take female clients