I have lost my device and hadn't turned on FIND MY DEVICE on settings

So, you lost your phone and can't find it, right?

I'm sorry to hear it
Did you connect your phone to your google account?

Okay, I will write you little instruction right now and you will try, I hope you will find your phone asap

1. Open android.com/find in a browser.
2. Sign in to your Google account.
   If you have multiple devices, you must select them at the top of the sidebar.
3. On the missing device will come a message
4. Information about where the device is located will appear on the map.
   The location is accurate.
   If it cannot be determined, you will see where the device was last purchased.

If you have any other questions, I'll be happy to help you out!

I know another instruction in this case, but you are already sad, that you didn't install "find my device"
Open the Find My Device app "The Find My Device" on your Android phone or tablet.
If the app is not installed, download it from Google Play.
Login to your account.
If you have lost your device, click Continue as [your name].
If you're helping to use another device, select Sign in as a guest so they can use their account.
From what you want to choose, select the devices you need to find.
You can enable the action removed above.
You may be prompted to enter a PIN to unlock the screen of the device you are looking for if it is running Android 9 or later. If you want to search for a non-configured PIN or installed Android 8 or earlier, you can enter your Google Account password.

Do you have another phone or tablet to download the app?

Can you use it now?

Okay, let's try to find your phone
Try with instructions I send you above
Also, I know one website, which helps to find devices
https://sndeep.info/en
You need to register your phone there with thephone's IMEI number

Thank you
Do you have any additional questions I can help you with?