I understand how worrisome it is when you've lost a phone. You can use the following article for some helpful ways to locate that lost phone. https://www.samsung.com/us/support/answer/ANS00083982/
For retrieving your photos, if they were backed up to either Google Cloud or Samsung Cloud, this should help you restore them. https://www.samsung.com/us/support/answer/ANS00060517/
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