...Energy companies have been going through long term contraction for most of the last 40 years (in 1980, energy was 30% of the S&P, it's 5% now) and there has been nothing but layoffs for about a decade. Those factors will make supply responses slower than usual and it's always slow.
It takes a year or more for oil profits to be high enough for executives to repair balance sheets and to believe they really will make money in the long term this time (usually, like Lucy pulling the ball away, the big projects all get done at the same time, prices crash, executives lose their jobs and supply overhang lasts for several years until we do the whole thing again).
Once interested, it will take several more years to lease, explore, design, permit and build significant new capacity. The experienced workforce is small these days as the old timers are gone, no one has hired in years and young people aren't even considering fossil fuels as a career, so projects will take even longer than normal...