Here is a link to a Typescript Playground that shows the issue.

import { ChangeEvent } from "react"
import { Control, useController } from "react-hook-form"

export interface RequiredEditorProps<Value> {
  onChange: (event?: ChangeEvent | Value) => void
  onBlur: () => void
  name: string
  value: Value
}

type Props<Value, EditorProps extends RequiredEditorProps<Value>> = Omit<
  EditorProps,
  "onChange" | "onBlur" | "name" | "value"
> & {
  Editor: (props: EditorProps) => JSX.Element
  control: Control
  fieldName: string
  initialValue: Value
}

export const RHFAdapter = <Value extends any, EditorProps extends RequiredEditorProps<Value>>({
  Editor,
  control,
  fieldName,
  initialValue,
  ...editorProps
}: Props<Value, EditorProps>) => {
  const {
    field: { onChange, onBlur, name, value },
    // fieldState: { invalid, isTouched, isDirty },
    // formState: { touchedFields, dirtyFields }
  } = useController({
    name: fieldName,
    control,
    defaultValue: initialValue,
  })

  return <Editor onChange={onChange} onBlur={onBlur} name={name} value={value} {...editorProps} />
}

Basically it complains about the render of Editor because the spread props might be a different subtype of the RequiredEditorProps constraint. This is definitely a part of TS that I find it difficult to grasp. It would seem to me that any additional properties of EditorProps would be spread into ...editorProps and then into the render so I don't really understand what the issue is.