On seat post there is often an telescopic seat post option to keep the frame stronger with more insert inside the frame.

There is no extending seatpost option for my mezzo , but there are items on ebay with the correct diameters.

I use a kogna extending seatpost that I use with a standard supsension seatpost on the inner.

I use this for off road riding and it softens the ride nicely, and presumerably spreads the load better.

I might look for a thudbuster that would work with a number of my bikes in this manner.