Hi Vanderhoven7,
One Bible believing response would be that Jesus said all the things described in Matthew 24:34 would happen within his generation. They were living in "the end of all things" 1 Peter 4:7. Indeed the Bible uses a lot of symbolism like in Acts 2:16-21 and we have no way of knowing when this world as we know it will end. The Kingdom of God has been here among the believers ever since Jesus was here as man Luke 17:21 and we look forward to a time when God is all in all 1 Corinthians 15:28 ☺️