Paragon-X: Support for 100M SFP transceivers
Paragon-X supports 100M SFP transceivers that have a 1G SGMII electrical interface and 100M optical interface.
Flexoptix S.1303.2M.G is a suitable transceiver.
https://www.flexoptix.net/en/s-1303-2m-g.html?option875=1