Add static content to a disabled option on a select input

I'm using a component which renders select inputs. I need to add a label because I cannot handle the HTML it renders to freely add a label I need.

Here is the HTML generated by the library I'm using

My problem is that there is no label shown such as "Select an option" or "Choose one" or something like that.

Any idea of how can I solve this?

The library's documentation does not provide me a solution.