Yes, for Functional Safety certification,  ACRN v1.4 release already received IEC61508 Safety Integrity Level 3(SIL3) certification on  2021-09-06.

There is WeChat blog with cert paper for your information: https://mp.weixin.qq.com/s/Qd6aluIZ7LczV4n9I2lKtA

For ARM platform, there is no support for ARM-based processors at this stage. but ACRN is designed to support multi-architectures, so welcome anybody from community to discuss and contribute for ARM support, thanks.