Have you tried walking her with another dog? Sounds wacky, but we’ve done that with foster dogs before that didn’t get along with other dogs and it helped.
We had organised this with someone and managed one session but her dog went in to heat that week and then she was buying another one so it fell by the wayside.
Mrs JBJs sister bought a teacup yorkie last Summer and I've been saying since day 1 we should be introducing them to each other to no avail. They've not said as much but I'm assuming they're reluctant to have such a small dog near Lola, I'd prefer they just said if that was the case.