There are plenty of ways, especially considering the Bible gives no dates at all and no one anywhere in the Bible shows even the least bit concern over the age of the Earth. I understand that you do not accept any of them, and that’s fine. But many many people are able to believe the Bible and have Christian faith just fine while accepting an old universe.
Even within the “young earth” idea of the universe, not everything had its “beginning” at the same time. People were created on day 6. So that was considered the beginning of humanity, but it didn’t have to be the beginning of the universe. Interestingly, Jesus doesn’t mention Adam or Eve in this passage.
This is baloney. I am not a member of a “religion of scientism.” I accept plenty of truth claims based on scientific information, and you do too. You just appear to accept slightly fewer claims than I do.
As @jammycakes explained well above, the age of the universe is based on measurement just like so many other scientific processes and technologies that we observe and use every day. I’m not aware of any scientist, Christian or secular, who believes in a 6,000-year-old universe based on actual evidence – only prior theological commitments. Which are fine to have, but should not be confused with science.