Looks like as of April 24 2020 EMUI 10 is now rolling out globally yet in Asia only at this time.
FYI... Also found this bit of info that indicates the series has run its course in regards to security patch support as P20 and P20 Pro are no longer listed, EMUI10 is likely last OS update/upgrade too

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Huawei EMUI/Magic UI security updates
About EMUI/Magic UI Security Patch Updates
• Huawei will introduce a monthly and quarterly security patch update programme for the following device models.
• The monthly and quarterly security patch update programmes include patches for the Android OS, and patches for Huawei devices released by Huawei.
• The release time of security patches may vary depending on the region and device model.
• The last security update for M3 Lite(CPN-L0J) was released in December 2019, with the Android security patch level of 2019-08-01.
Current monthly security patch updates will be released for the following device models¹
HUAWEI P series: P30 Pro, P30
HUAWEI Mate series: Mate 30, Mate 30 pro, Mate 20 X, Mate 20 Pro, Mate 20, Mate 20 RS
HONOR series: HONOR 20, HONOR 20 PRO, Honor View20, Honor 10, Honor 10 lite
Current quarterly security patch updates will be released for the following device models²
HUAWEI P series: P30 lite,
P20 lite, P Smart 2019, P9 lite mini, P smart Pro
HUAWEI Mate series: Mate 20 Lite, Mate 10 Lite
HUAWEI Y series: Y9 Prime 2019, Y9 2019, Y9 2018, Y6 2019, Y6 Pro 2019, Y6 2018, Y5 2019, Y5 2018, Y5 Prime 2018, Y5 Lite, Y5 Lite 2018, Y3 2018, Y MAX, HUAWEI Y9s, HUAWEI Y6s
HONOR series: Honor 20i, Honor 10i, Honor 10 Lite, Honor 9 Lite, Honor 9i, Honor Play, Honor 8A, Honor 8X, Honor 8S, Honor 8C, Honor 9X, Honor 7S, Honor 7A
HUAWEI nova series: nova 5T, nova 4, nova 3, nova 3e, nova Lite 3, nova 3i
Tablets: M5 (8.4" & 10.8"), M5 Pro, T5 (10.1"), M5 lite (10.1" & 8.0")