You can embed your PhotoBooth into an existing website or event platform using an iFrame.
The code for this iframe is:
<iframe src="https://photoboothonline.app/<<YOUR_PHOTOBOOTH_NAME>>/" allow="camera"></iframe>
For example, if to embed this example PhotoBooth :
https://photoboothonline.app/hivemind
The iFrame code would be :
<iframe src="https://photoboothonline.app/hivemind" allow="camera"></iframe>
NOTE: Ensure the page you are embedding the iframe into also allows for the required camera permissions.
The same can be done with your gallery link, simple add /gallery onto the end of the URL, for example:
<iframe src="https://photoboothonline.app/hivemind/gallery" allow="camera"></iframe>