A list of devices that will support the future MIUI 11 update has been put online. It consists of both Xiaomi and Redmi smartphones, although some Poco models will probably get it in the future as well:

– Mi 9, Mi 8, Mi 8 SE, Mi 8 Pro, Mi 8 Explorer Edition, Mi 6,
– Mi Mix 3, Mi Mix 2s, Mix Mix 2, Mi Mix, Mi Note 3, Mi Note 2,
– Mi 6X, Mi 5c, Mi 5X, Mi 5s, Mi 5s Plus, Mi Max 3, Mi Max 2, Mi Max, Mi Play, Mi Play,
– Redmi 6, Redmi 6A, Redmi 6 Pro, Redmi 5, Redmi 5A, Redmi 5 Plus, Redmi 4, Redmi 4A, Redmi 4X, Redmi 3s, Redmi 3X, Redmi S2,
– Redmi Note 7, Redmi Note 6 Pro, Redmi Note 5, Redmi Note 5A, Redmi Note 4, Redmi Note 4X.

If your model is not here then I am sorry – it is probably because it is not being supported with new updates anymore. Speaking of updates, we do not know what changes exacly will the MIUI 11 bring.