I decided to port /camera command from Minecraft Bedrock

Syntax:

/camera <players:target> clear - Clears your camera settings

/camera <players:target> fade time <fadeInSeconds: time> <holdSeconds: time> <fadeOutSecond:time> color <red: int> <green: int> <blue: int> - Color fade effect

/camera <players:target> set <mode:string> - Set your camera mode

/camera <players:target> set <mode:string> pos <position:vec3> - Set your camera position

/camera <players:target> set <mode:string> rot <rotation:vec2> - Set your camera rotation

/camera <players:target> set <mode:string> facing <lookAtEntity:entity> - Set your camera look at entity

/camera <players:target> set <mode:string> facing <lookAtPos:vec3> - Set your camera look at pos

/camera <players:target> set <mode:string> ease <easeTime:float> <easingType:easing> - Set your camera look at pos

List of all easings

linear, spring, in_quad, out_quad, in_out_quad, in_cubic, out_cubic, in_out_cubic, in_quart, out_quart, in_out_quart, in_quint, out_quint,
in_out_quint, in_sine, out_sine, in_out_sine, in_expo, out_expo, in_out_expo, in_circ, out_circ, in_out_circ, in_bounce, out_bounce, in_out_bounce,
in_back, out_back, in_out_back, in_elastic, out_elastic, in_out_elastic

You can add your own camera presets with datapacks and change them.

You can change this properties inside of presets json files:

"inherits_from" - Default camera preset as parent, can be set to ("minecraft:first_person","minecraft:third_person","minecraft:third_person_back","minecraft:free"),
"detached" - Property to make your camera preset detached, like in third person (true, false)
"mirrored" - Property to make your camera preset mirrored, like third person front (true, false)
"bobView" - Property to make your camera bob while moving (true, false)
"free" - Makes your camera unattached to player entity (true, false)
"zoomOut" - Zoom value is used in detached camera modes (Default is 4.0)
"rotation" - Camera mode default rotation (Default is [0, 0])
"position" - Camera mode default position (Default is [0, 0, 0])
"offset" - Camera mode default offset, can't be used in free camera modes (Default is [0, 0, 0])

I decided to port /camera command from Minecraft Bedrock

You can add your own camera presets with datapacks and change them.

Also you can disable this feature inside of options menu and use Free Cam keybinding (Default is B key)

Bedrock Camera Command