Hi Team.
MUX508IDR and MUX508ID new datasheet shows NiPdAu | Sn lead finish. i have also checked using path " TI.com > Quality & Reliability > Material Content Search", but not getting proper details mentioned in below Screen shot and material search link for the reference.
https://www.ti.com/materialcontent/en/search?partType=tiPartNumber&partNumber=MUX508IDR
Can you please confirm whether that the parts are having the SN plating or NiPdAu plating?