Potty training

What I've read sometimes: cut a hole in the diaper and then sit her on the toilet. That way she might not realize she's actually peeing on the toilet and still has her familiar diaper on..?
No idea if it works. It's from another forum though.

Or maybe put underwear under her diaper? So she feels that it's 'dirty'?

They only become toilet trained when they're ready for it themselves. From what I read, she isn't ready yet. Keep offering the potty, but also keep using diapers. Don't force it; she'll sit on it on her own eventually. She's only 2.5, so give her another year to practice on her own.

Here we also have a little girl who’s already 2 years old and still totally not interested in using the potty. We put her on it from time to time, which she doesn’t mind at all, but she only pees when she’s off her potty.
It’ll come, right...

Get a toilet reducer and a step stool so the toilet isn't so big and high? Let her get used to the idea by having her favorite stuffed animal or doll go first. Be patient.
I was lucky that my daughter became bowel-trained first. That made it a bit easier to get her on the potty because she didn't want to do that in her diaper.
And what also helped was buying really nice sticker sheets together and telling her she could pick a sticker every time she peed on the potty or toilet. Then it's her own choice.

Oh, I feel so lucky to have a 16-month-old daughter who absolutely loves her potty. I put the potty down and sit her on it from time to time. Otherwise, she comes with me when I go to the toilet; we listen to the sound of my pee, she gets to hand me the toilet paper, and she’s allowed to flush. That makes it all very interesting for her.

At first, she wouldn’t go on her own, but this week is her week... she pees and poops on it. Before, she used to sit on it too but did nothing, and she’d get off again too quickly. Now she stays seated. I even take the potty with me when I go to pee, and we sit together.

I can also see from her when she needs to go. Then I tell her to go on the potty, and she manages it. Earlier, I didn’t have enough time and wasn’t as alert. But last week I was, and that helps.

Every little pee deserves a little treat, which helps a lot too! Good luck, and be patient.

Maybe take the pressure off for a bit. When Floor wasn't ready, I just left the potty out, she kept her diaper on, and we'd occasionally have her sit on the doll. Then try again after a few weeks.

Reading books about it? If it's causing her so much stress right now, I'd wait a bit. I've used the "it's warm weather, just take the diaper off and go" technique myself. My daughter could also signal it but was too shy. In the end, we read books and pushed through. The first day she was very angry, and for the first 2-3 days she peed like 17 times or so. But since then, she's been fully potty-trained, and she became dry at night at the same time. Though I do have to get up sometimes at night with a potty, haha. Reading books made it less scary; we read "Bobbi on the Potty" very, very often. Now looking at a book about sleeping in a big bed

Oh, and only used stickers if she really wanted them or had tried them for a while. My daughter wanted them all right away but she’s usually really into stickers anyway. Maybe there’s something your little one is even more crazy about than stickers?

Got the book "Kas op het potje" by Paulien Oud from the library. It really helped a lot.