However, with the latest map update also, as can be seen on screenshots, 2018 OSM maps contain more buildings than 2020 TA or NT in my area. Shame for them.
The situation is even worse in some other regions, as some of my friends have confirmed to me.

It is a pity that they do not publish new maps from OSM
On overpass-turbo site you can extract the database of addresses and POi which is much much richer.
I'm not sure if they can be converted to an adequate sygic format (although there is a lot of work).