You can share your project Photo Log with outside external users by using the Share link in the top right corner of the page header.
Click the Share Link button and then Copy the Share link so you can share the webpage with an external user.
The external user will see a webpage similar to the Share Link provided below:
https://tools.flipperforce.com/photo-log/share/xVH5x3EILA9b523GbZrVTTA1UeEivSahdaliK4DyrDOJLoE102