There are four ways you can achieve this:

1. First is through the paid version - you buy SiYuan licence and use their sync service
2. Second, also paid - you need to buy the licence and you will be able to use third party sync services
3. (for advanced users) You can use a docker image to host your SiYuan, and connect via local lan connection
4. Keep your SiYuan on the mobile app, and connect on computers via web app, that each app can host

Those are great answers, thanks. I was looking for this.

Just one more thing remains though...

Can I display block's attributes inside of it?

Thanks for the reply! I'll find another way then! 👍