A bearing is going out, shedding its oils and grease inside and making the noise. Post on FB marketplace or Craigslist and someone will fix it for you. OR don't and just buy another.
Yes, support bearings are shot, replace them all (probably two), but also the front and rear drum gaskets. While in there, a new belt and idler pulley too.
It's not hard at all, but I do wonder how the grease in getting inside the dryer drum. Check for defects.
More likely the grease is from your washer. That seal is more involved to replace, but not difficult.
