TypeScript object type: narrow key/value pairs to those where the value is of type

Question

Let's say I have a TypeScript type that looks like this:

type Utilities = {
  getFeatureFlag: (name: string) => string;
  apiRequest: (endpoint: string) => Promise<object>;
  getConfig: (name: string) => Promise<object>;
}

And from this type, I want generate a subtype where the only key/value pairs to keep are those where the values are functions that return promises. So the resulting type would be the following (same, but with getFeatureFlag omitted):

type PromiseUtilities = {
  apiRequest: (endpoint: string) => Promise<object>;
  getConfig: (name: string) => Promise<object>;
}

Is it possible to do this with some set of TypeScript utilities or keywords?