Newly inherited mineral rights

My family was recently contacted by a land man about roughly 8 acres of gas & mineral rights, an energy company would like to lease. The grandparent who owned this lease died in 2000. My father (4 children) passed before my aunt (4 children), who passed in 2005. They both owned 8 acres of mineral rights. Curious why after 26 years, we’ve just now been contacted. When searching the unclaimed money in TX, my aunt has a few royalty checks sitting in there but assume her children have been collecting the other royalties. Do we need to hire an attorney to look into this? Or would it be they’re just now doing the horizontal drilling across our 8 acres?

Called 640.00 acres, more or less, being all of Section 25, Block 37, Township 3 South, T&P RR Co. Survey, A-548, Midland County, Texas