'is not appealing' is correct and usable in written English.
You can use it when you want to express that something is not attractive or interesting. Example: The idea of running a marathon is not appealing to me.
Much like Umunna, he has made an argument that Labour is not appealing enough to the centre ground, saying the party needs to appeal to "John Lewis couples" and those who aspire to shop in Waitrose.
A puling person is not appealing".
(Skulking around other people's bathrooms is not appealing).
The thought of openly discussing his contract is not appealing.
Yes, but that option is not appealing, either.
Other tools rely on handcrafting the schema mappings, which is not appealing at all.
"What you see when you stand back is not appealing whatsoever," she said.
If growing the plant indoors is not appealing, another trick can be done before heavy frost.
The idea of putting five minutes into it is not appealing".
"Life that is nothing but leisure is not appealing to them," he said.
The notion that people are making huge errors in judgment is not appealing.
