You can use Photoshop's generative fill feature to quickly combine 2 images together.
In this short video, we will open 2 very different images, create a selection around the area we want to fill, and then merge them together with a single click.
Generative Fill | Photoshop: https://youtu.be/gaERaBeP7Ls
Harmonization Neural Filter | Photoshop: https://youtu.be/Aq9LQfEis9k
Images used in the video (affiliate):
Desert: https://1.envato.market/q4jVXn
City skyline: https://1.envato.market/xkGODk
Running person: https://1.envato.market/DKNBzy
Shark: https://1.envato.market/9gY2ae
Water bottle: https://1.envato.market/jrLVAn
Waterfall: https://1.envato.market/PyDBN6
Hot spring: https://1.envato.market/5gNKPn