No study has directly linked fracking to methane.
In addition this methane is much less harmful than co2 emissions from coal which fracking has killed in the USA
Fracking releases methane, which is not accounted for in such studies.
https://www.theguardian.com/environment/2019/aug/14/fracking-causing-rise-in-methane-emissions-study-finds
The U.S. Environmental Protection Agency’s (EPA) 2018 Greenhouse Gas Inventory (GHGI) was released on April 11. It revealed total greenhouse gas (GHG) emissions in the United States decreased by 35.6 million metric tons of CO2 equivalent, or 0.5 percent from 2016 to 2017. Indeed, U.S. GHG emissions are now at their lowest levels since 1992 and only 1.3 percent higher than their 1990 levels.
Since 2005, GHG emissions are down 12 percent. Over this same period, oil production in the United States has increased by 80 percent and natural gas production has increased by 51 percent, according to the Energy Information Administration (EIA).
This is primarily due to the hydraulic fracturing (or “fracking”) revolution of the past decade.