YPsat (Young Professionals Satellite) on Ariane 6 (2024 June 15-)

Downlink for FT-8 in GENESIS-A is configured to transmit in 144.175 MHz with callsign AO4ARI HO60 if the antenna has been deployed, and AO4ARI HO61 if the antenna has not been deployed

SSTV is configured to use 144.550 MHz with Robot 36 mode (live images)

Here you have a document summarizing all:

Be aware that the power is very low! 75 uW. It is going to be require a very good RX system…

Thanks to Félix EA4GQS for this information