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iPhone 14 Pro Technical Specifications · Pro camera system · 48MP Main: 24 mm, ƒ/1.78 aperture, second-generation sensor-shift optical image stabilisation, 

iPhone 14 Pro and 14 Pro Max - Technical Specifications

Extracted from the above...

"Video Recording

• 4K video recording at 24 fps, 25 fps, 30 fps or 60 fps
• 1080p HD video recording at 25 fps, 30 fps or 60 fps
• 720p HD video recording at 30 fps
• Cinematic mode up to 4K HDR at 30 fps
• Action mode up to 2.8K at 60 fps
• HDR video recording with Dolby Vision up to 4K at 60 fps
• ProRes video recording up to 4K at 30 fps (1080p at 30 fps for 128GB storage)
• Macro video recording, including slow motion and time-lapse
• Slow‑motion video support for 1080p at 120 fps or 240 fps
• Time‑lapse video with stabilisation
• Night mode Time-lapse
• QuickTake video
• Second‑generation sensor‑shift optical image stabilisation for video (Main)
• Dual optical image stabilisation for video (Main and Telephoto)
• 3x optical zoom in, 2x optical zoom out; 6x optical zoom range
• Digital zoom up to 9x
• Audio zoom
• True Tone flash
• Cinematic video stabilisation (4K, 1080p and 720p)
• Continuous autofocus video
• Take 8MP still photos while recording 4K video
• Playback zoom
• Video formats recorded: HEVC, H.264 and ProRes
• Stereo recording"

4K video recording is available at 24 fps, 25 fps, 30 fps or 60 fps. Are you asking about another mode not mentioned in Apple's Specifications? If yes, give us some details.