According to its official Steam page, the only way via which you can change resolutions is by using Steam commands. Not only that, but the game does not support 1440p. Again, and according to the devs, Ninja Gaiden: Master Collection PC only supports 720p, 1080p and 4K.
To configure the resolution, open the game's Properties from your Steam Library. Then, you can enter "720p", "1080p", or "4k" in the text field of "LAUNCH OPTIONS".
According to its official Steam page, the only way via which you can change resolutions in Ninja Gaiden: Master Collection is by using Steam commands.
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