Hello @alan-griffiths
since it is a new installation it could be anything at this stage. To isolate issue to either Firewall or Panorama side, could you please run below commands and share the output:
Firewall:
show log-collector preference-list
show logging-status
Panorama:
show logging-status device <serial number of Firewall>
Depending on the output from the above commands, I would set next course of action, however on general note make sure that Firewall as well as Panorama are set to the same time/time zone: https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000ClXACA0 and make sure that Firewall is added to log collector under: Panorama > Collector Groups > [Collector Name] > Device Log Forwarding > Devices > Modify > [Select Firewall] and press OK to apply. Do not forget to commit this change and push configuration to log collector under Commit > Push to Devices > Edit Selection > Collector Groups > [Collector Name] > OK.
Kind Regards
Pavel
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