First of all, you need a layer to superimpose on the original photo. You can search for "lens overlay image" online.
Step by step
1. Open the photo in Snapseed
2. Tools → Double Exposure
3. Select the overlay image from the library
4. Blending mode → Lighten
5. View edits → make adjustments
6. Vintage filter
7. Glamour glow filter
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