Yes they are with Christ in heaven.
They were in Abraham's bosom 'paradise', a place of good things and were ministered to by angels.
Luke 16
19 “There was a certain rich man who was clothed in purple and fine linen and [
h]fared sumptuously every day. 20 But there was a certain beggar named Lazarus, full of sores, who was laid at his gate, 21 desiring to be fed with [
i]the crumbs which fell from the rich man’s table. Moreover the dogs came and licked his sores. 22
So it was that the beggar died, and was carried by the angels to Abraham’s bosom. The rich man also died and was buried. 23 And being in torments in Hades, he lifted up his eyes and saw Abraham afar off, and Lazarus in his bosom.
Luke 23
42 Then he said [
a]to Jesus, “Lord, remember me when You come into Your kingdom.”
43 And Jesus said to him, “Assuredly, I say to you,
today you will be with Me in Paradise.”
And so we can know where Jesus went when He died.
He had not yet ascended back into heaven.
John 20:17
Jesus said to her, “Do not cling to Me, for I have not yet ascended to My Father; but go to My brethren and say to them, ‘I am ascending to My Father and your Father, and
to My God and your God.’ ”
Ephesians 4
7 But to each one of us grace was given according to the measure of Christ’s gift. 8
Therefore He says:
“When He ascended on high,
He led captivity captive,
And gave gifts to men.”
9
(Now this, “He ascended”—what does it mean but that He also [d]first descended into the lower parts of the earth? 10 He who descended is also the One who ascended far above all the heavens, that He might fill all things.)
Typically in scripture, the place of the dead, the pit, all of that is thought of as in the earth, below our feet.
The place where in the OT, all people went at death.
But it was divided with a great gulf of separation
And it was not heaven.
Some have claimed Jesus ascended into heaven when He died, but that is impossible according to the scriptures.
Jesus tells us where He was, as did Peter.
Matthew 12:40
For as Jonah was three days and three nights in
the belly
of the great fish, so will
the Son
of Man be three days and three nights in
the heart of the earth.