Spine version 4.3 is not mentioned in the provided contexts, and there is no specific information about its compatibility with Phaser 4.1 or the spine-phaser-v4 runtime. However, the spine-phaser runtime is compatible with Spine 4.1, as indicated by the available documentation and examples. For the most accurate and up-to-date information, it would be best to check the official Spine Runtimes repository or the Esoteric Software website.