How do I remove exclamation mark with internet icon after erasing MacBook Pro?

"How do I remove exclamation mark with internet icon after erasing MacBook Pro?: I tried to erase my MacBook Pro and now there’s this exclamation mark with internet icon on the screen that doesn’t leave the screen even if connect to the internet as prescribed. Any help please.?"

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Nothing on your hard drive is seen. So, it seems you need to install the macOS anew.

Installing the MacOS on an Empty Drive:

Incompatibility may be the issue here. If so, then that is because your Mac does not have the hardware to go past a certain macOS.

I. Determine which macOS(s) can be Installed:

A. Start Here: Learn About Compatibility and how to Identify your Specific Mac Model - Apple Support

B. How to Verify:

I. Reveal your Model:

What is the Model of your Mac? To find out...

1. Go to: Apple menu
2. Click: About this Mac
3. View: Second Line-Down

then...

II. Compare the Results:

See if the Model you found is shown here:

• macOS Sequoia is Compatible with these Computers - Apple Support
• macOS Sonoma is Compatible with these Computers - Apple Support
• macOS Ventura is Compatible with these Computers - Apple Support
• mcOS Monterey is Compatible with these Computers - Apple Support
• macOS Big Sur 11 Hardware Requirements - Apple Support
• macOS Catalina 10.15 - Hardware Requirements - Apple Support
• macOS Mojave 10.14 - Hardware Requirements - Apple Support
• macOS High Sierra 10.13 - Hardware Requirements - Apple Support
• macOS Sierra 10.12 - Hardware Requirements - Apple Support
• OS X El Capitan 10.11 - Hardware Requirements - Apple Support
• OS X Yosemite 10.10 - Hardware Requirements - Apple Support

then...

III. Perform the Install:

A. First, Back Up your Mac First:  Be certain you Create a Time Machine Backup of your Mac, so that way you can have something to restore your Mac from, should anything go wrong with the reconfiguration.

B. Finally, Install the MacOS:

• Use WiFi or Ethernet: You an use Ethernet or WiFi. Using a hardware connection(Ethernet) is usually more reliable than a wireless one(WiFi). Use this adapter, if you have no Ethernet connection: Apple USB Ethernet Adapter - Apple
• Use Internet Recovery Mode: Hold these three keys down upon boot: Option-Command-R
• Use a Bootable Installer: Go Here: Create a Bootable Installer for macOS - Apple Support. Using Terminal, you'd connect a USB Flash Drive, and then install it with the following command. You need a different Mac to create one --ask a friend or family member if you may use their Mac to create it.

"How do I remove exclamation mark with internet icon after erasing MacBook Pro?: I tried to erase my MacBook Pro and now there’s this exclamation mark with internet icon on the screen that doesn’t leave the screen even if connect to the internet as prescribed. Any help please.?"

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Exclamation Mark on Boot:

An Exclamation Mark means your Mac is trying to go in to Recovery Mode. So learn what to do, at this link: if your Mac can't Start Up from macOS Recovery - Apple Support

So, Reinstall the macOS:

Start by reinstalling the MacOS. Nothing would be deleted. It's just that items that have become corrupted or deleted, would be replaced or reinstalled back to where they should be.

Go Here:

• Intel: Use macOS Recovery on an Intel-based Mac - Apple Support
• Apple Silicon: Use macOS Recovery on a Mac with Apple silicon - Apple Support

If your Mac doesn't start up all the way - Apple Support

"A globe with a warning symbol (exclamation point) means that your Mac tried to start up from macOS Recovery over the internet, but couldn't."