According to two leakers, Huawei will launch several new smartwatches in Q4 2021. Reputedly, the company is readying the Watch D, Watch GT 3 and Watch FIT 3. While the latter two are successors to current smartwatches, the Watch D will be Huawei's first that can monitor blood pressure levels.
https://www.notebookcheck.net/Huawei-tipped-to-release-three-new-smartwatches-before-the-end-of-the-year-including-one-that-can-monitor-your-blood-pressure.563075.0.html
A very good way to send your blood pressure straight to the chinese communist party.
I am so happy to give my bloopressure info to the chinese communist party as i am happy to give my hidden data from secured container Knox on Samsung smartphones developed under cooperation Samsung and NSA.
But, not to spam here than before, i can say, that i cannot think, that the measure method will be accurate enough. The measurement of heart rate is more precise but there are differences to reality too (tested with real-ECG H10 Polar sensor Huawei Watch GT3). May be, not the absolute value, but the relative change (in the night) may be usefull, to detect dangerous spikes.