External connection blocked? 3306

Website URL

https://thekillzone.free.nf/binance_futures/?i=2

Error Message

In Infinyfree: Connection failed: Connection timed out

In site PHP Online (I used a simple connection script, and I used the same script on the Infinity Free website.)

MySQL Connection Test (PDO) Connection successful!

Other Information

I have my website hosted on InfinityFree, but my database is on another free hosting service because my computer generates data and sends it there, and the website has always queried it normally. Now I’m getting a timeout error on the InfinityFree website, but if I access it from another application with a simple PHP query, it works fine. Do you know if something has changed, or if I need to adjust some new configuration? Thank you.