Will my home country find out I own property or hold money in Dubai (CRS)?

Likely, via CRS. The UAE participates in the Common Reporting Standard (live since 2017): UAE banks identify account holders who are tax residents elsewhere and report them to the Ministry of Finance, which exchanges the data with those countries' tax authorities. CRS reports financial accounts, not title deeds directly, but the balances funding your purchase are visible. CRS 2.0 rules apply from 2027 (first exchange 2028).