A ship auger bit with extension can easily go thru 24".  With a couple extensions 48-60" is doable so long as the hole is larger than the bit extension coupler.

https://www.amazon.com/Milwaukee-48-13-6000-18-Inch-Ship-Auger/dp/B0000224AP/ref=sr_1_2?dchild=1&keywords=milwaukee+ship+auger+bit+1%22&qid=1620069280&sr=8-2

https://www.amazon.com/Milwaukee-48-28-4006-12-Inch-Extensions-Selfeed/dp/B0000224A4/ref=sr_1_8?dchild=1&keywords=milwaukee+ship+auger+bit+1%22&qid=1620069323&sr=8-8