Wrong.
Ultimately, all geological dating is based on radio-metric results which establish ages of various rock strata, and hence fossils found in them.
Those same fossils found in other locations can help determine geological ages, often confirmed by further radio-metric dating.
So, despite your fondest hopes, there is nothing "circular" about it.
Yeah, sure, and when the radio metric results give wildly different “ages”, they ask “what fossils were in the layer with it?” so they can pick the matching result.
Besides, radiometric dating relies on the assumptions of initial “zero” condition, constant rate of decay, and no leaching or doping of the sample over the period of time in question.