There are a few problems with this.
One problem is that it's not clear whether participation in those polls is limited to actual lesbians, i.e. biologically female people who are exclusively sexually attracted to other biologically female people. If people who are biologically male or who have sex with biologically male people are responding to that poll as "lesbians", it's not difficult to see why this group appears to be strongly in favour of "trans rights". I would like one of these polls to be conducted where the category of "lesbians" is limited to biologically female people who are only sexually attracted to other biologically female people and see whether that changes the results at all.
I would also say that a "female lesbian" who is in a relationship with a male person is not actually a lesbian, she is either heterosexual or bisexual. Some people consider this approach to be gate keeping, but I think some gate keeping is important here. If you allow anyone to identify as a lesbian then the people who are actually lesbians according to the original meaning no longer have a word to describe themselves.
I'm also not sure that holding strongly gender critical views is a "minority viewpoint". I think that people who describe themselves as gender critical are very definitely in a minority. But there is a large group of people who will say that they are in favour of trans rights and do not agree with the gender critical viewpoint, but then become remarkably gender critical when you dig down into the detail.
"Yes, trans rights are human rights and of course trans women are women. It is really unkind to describe them as male. What's that? Should they be allowed to compete in women's sports? Oh, well, no I don't think so. That would be unfair, wouldn't it? But in all other situations they should be, it's important to be kind. Oh, Karen White and Isla Bryson? No, clearly they shouldn't be placed in women's prisons, that's really dangerous for female prisoners. But the fact that some people have abused the system doesn't mean that we should tar all trans people with the same brush. We just need to have proper safeguarding in place, that's all. What's that? Rape crisis groups? I don't see the problem. Surely as long as trans people are also provided for they can have different groups for biologically female survivors and for trans survivors. Oh, that's not allowed? Well...I don't agree with that. Toilets though, everyone needs to stop making such a fuss about toilets. You wouldn't go to all the trouble of having your penis removed just to gain access to women's toilets, that would be absurd. Oh, most of them don't actually have their penises removed? I didn't know that. Well only the ones who have had their penises removed should be allowed in women's toilets and changing rooms. How can we tell who has had their penis removed and who hasn't? Well, I don't know. I hadn't thought about that."
Bam. This person is gender critical.
And this person is, according to the YouGov polls, most people.