Since AVCHD 2.0 files use the or .M2TS container, you can find sample test files at several repositories:
: Added support for 1080/60p and 1080/50p frame rates at high bitrates (up to 28 Mbps). skachat obrazets faila avchd 2
: A resource for high-definition and 4K demo files, including TS and MP4 variants which are technically similar to AVCHD structures. 🛠️ Key Technical Specifications Since AVCHD 2