Huawei March 2020 security update for Huawei Mate 20 and Mate 20 Pro comes with EMUI 10.0.0.196 and 161MB software size (via Huawei Central).
Huawei Mate 20 and Mate 20 Pro receiving a new EMUI update with March 2020 security enhancements and a second update package fixes issue with system stability in certain situations.
The March 2020 security improves system with Google security patches and fixes 2 critical and 20 high levels of Common Vulnerabilities and Exposures (CVE).
According to Huawei Central, the update is rolling out in European markets and may expand gradually.
Note: EMUI 10 rolling out in batches and the EMUI version and size may vary depending on the region/country.