A spherical of applause for Erik Kennedy who designed and shared this freebie.
A free set of iPhone mockups for Figma. They can be found in 4 sizes: iPhone SE (2nd Gen), iPhone 12 & 13 Mini, iPhone 12 & 13 regular/professional, and iPhone 12 & 13 professional max fashions. The templates have ruler strains that will help you place objects simply on them.
A improbable useful resource which you can get free of charge!