You can use embed block, and then insert this query

For unfinished task
SELECT * FROM blocks WHERE markdown LIKE '%[ ]%' AND subtype = 't' AND type = 'i'

For finished task
SELECT * FROM blocks WHERE markdown LIKE '%[x]%' AND subtype = 't' AND type = 'i'

You could read SiYuan User Guide, in "Content Block" section, there are several examples of query that you can use, and modify according to your needs including the one you're asking for

I see, thank you

Can we still use 3rd party synchronization even though we don't subscribe to siyuan?

We'll support by donation though

Actually, I have tried to add OneDrive as my network location in my PC using WebDAV protocol and it's working, but when I tried to configure OneDrive WebDAV in SiYuan, it gave me error 401 Unauthorized Error

Eventually, I'm using other cloud service and the sync is working fine now

Thanks