According to stereophile it plays DSD at 64 or 128 and PCM up to 192khz so my guess is either you have a setting wrong or your player is broken.
https://www.stereophile.com/content/sony-hap-z1es-high-resolution-file-player-measurements
https://www.stereophile.com/content/sony-hap-z1es-high-resolution-file-player-measurements