There are numerous ways to date various things that are very old and there are some assumptions involved that can confound our estimates. But that the earth is geologically and otherwise billions of years old is probably beyond dispute. At the very least the markers agree with this conclusion. C14 dating is useless before 55,000 years ago because of its short half life and loses a lot of accuracy at about 40,000 years ago.
There are substances on Earth, that is even older than the Solar System, including the Earth.
This substance - silicon carbide was found in carbonaceous chondrite type meteorite - the Murchison Meteor that crashed near small town of Murchison, Victoria, Australia, in 1969.
Silicon carbide don't exist naturally on Earth in large volumes, but the compounds have been synthesized and produced in large quantities by companies for decades, because they have many applications.
But silicon carbide do exist naturally in space, particularly in asteroids and meteors.
Anyway, the silicon carbide found in the Murchison Meteorite has been dated to 7 billion years old.
You certainly wouldn't use carbon-14 to date ancient meteorite. Uranium-238 isotope has half-life of 4.5 billion-year and Samarium-147 can measure up to 100 billion years.
U-238 is commonly used to date minerals like zircon, which are known to exist and form in the early Precambrian eon.