you can get PAN-OS image only if you have support license activate in CSP. More details are in this KB: https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA10g000000Cm62CAC
Latest PAN-OS supported by PA-200 is 8.1, so you will not be able to upgrade to anything higher than that. Also, PA-200 will be EoL in October 2023. This kind of Firewall should not be used anywhere in production except of Lab/study purpose.
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