The Es’Hail geostationary satellite has (in the last few minutes) been made operational. It includes an amateur radio linear transponder (13cm up 3cm down). If you have 13cm capability you could give it a try by using the webSDR here:https://eshail.batc.org.uk/nb/
I understand people are having success with as little as 500mW to relatively small antennas (yet to be confirmed). SOTA?