How to reproduce:
1. Open the “ReproProject2022.zip“ project
2. Open the “SampleScene“
3. Build for iOS
4. Open the “Unity-iPhone.xcodeproj“ in Xcode
5. Deploy to a device
6. Perform a memory capture
7. Open the “ReproProjectU6.zip“ project
8. Repeat steps 2 to 6

Expected result: The Mesh memory allocation does not increase
Actual result: The Mesh memory allocation increases

Reproducible with: 6000.0.62f1, 6000.2.11f1, 6000.3.0b9, 6000.4.0a4

Reproducible environment: macOS 15.7 (M4 Max), Windows 11 (Reporters)
Not reproducible environment: No other environment tested

Reproducible with these devices:
VLNQA00626, iPhone 16 (MYE73QN/A), CPU: Apple A18 Pro, OS: 18.5
VLNQA00491, iPhone 14 Pro (MQ083PX/A), CPU: Apple A16 Bionic, OS: 16.0
VLNQA00416, iPhone 13 Pro (MLVA3ET/A), CPU: Apple A15 Bionic, OS: 17.6.1
VLNQA00535, iPhone XS (MT9F2ET/A), CPU: Apple A12 Bionic, OS: 17.6.1
VLNQA00232, iPhone 8 Plus (MQ8M2ET/A), CPU: Apple A11 Bionic, OS: 16.7.10

Note: From Memory Profiling, it seems that in Unity 6, the memory allocation is being blown up because of the Graphic Size