useRef's reference value change on re-render caused by strict mode while useState does not

Question

I was trying to run something in useEffect, but did not wanted it to run on initial render so I created a hook useIsMounted.

  import { useRef, useEffect } from 'react';

export const useIsMounted = () => {
    const isMountedRef = useRef(false);
    useEffect(() => {
        console.log(isMountedRef.current);//prints false on first render and true on second render.
        isMountedRef.current = true;
    }, []);
console.log(isMountedRef.current);//prints false on both renders
    return isMountedRef.current;
};

Here I have put two console logs and I am getting different values on two renders(one caused by strict mode) while the one outside useEffect returns same value on both renders.

Also whenever I use useState instead of useRef it console log's same value (false) on both render outside and inside of the useEffect.

here is the sample

import { useEffect, useState } from 'react';

export const useIsMounted = () => {
    const [isMounted, setIsMounted] = useState(false);
    useEffect(() => {
        console.log(isMounted); //prints false on both renders
        setIsMounted(true);
    }, []);
    console.log(isMounted);//prints false on both renders
    return isMounted;
};