Revelation 21:4 shows that all tears will be wiped away in heaven. There will be no more death, sorrow, crying, or pain. This, I believe will include all sadness and grief over loved ones who refused God's invitation and are not also there. I cannot understand how God will remove this pain, but I believe His word and that He will do so as promised. I also believe that in heaven everyone's perspective and understanding will be clear and complete unlike now where there is only temporal, finite understanding. God has offered heaven to everyone, everyone is welcome and only those who refuse and don't want to be there won't be.
For God so loved the world that He sent His one and only Son that whoever believes in Him should not perish but have eternal life. John 3:16
Yes, those that believe will Not perish or be destroyed like the wicked.
-Psalm 92v7
God desires none to perish or be destroyed but repent.
-2nd Peter 3v9
Please notice Rev. [21v3] because the setting is Not heaven.
The tent [dwelling] of God is with men or mankind. [earth]
Death, sorrow, pain does not exist in heaven, so there would be no need to end death in a death-less heaven.
Verse 4 also mentions death as part of the former things or past things.
Verse 5 says God will make all things new.
God does not have to make all things new in heaven but earth.
That is why Rev. [11v18 B] says God will bring to ruin those ruining the earth.
Rev.[21v2] places new Jerusalem as 'coming down' to us 'Not going up' to heaven.
Revelation [21v4] is a miniature description of the Garden of Eden.
All those good conditions existed on earth in Eden before mankind's fall.
During Jesus messianic 1000-year reign over earth Jesus will undo all the wrongs that started in Eden such as bringing our 'last enemy death' to nothing [1st Cor 15v26] and earth will see paradisaic conditions that originally existed in Eden.
- Rev. 22v2