Not that im aware of.
However I think you could setup a DNAT rule to forward the NTP request made against some ip thats routed through the PA device (or ip which is already been used by the PA) into some NTP server of your choice.
For example if you only use RFC1918 addresses in your core you could address the ip of the PA device and with DNAT similar to:
translated dstzone: outer
translated dstip: NTP_ip_on_outer
along with a security rule that allows inner to reach outer for particular service like udp123 (and ip) and appid=ntp.
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