Unable to install MSSQL Drivers PHP on Ubuntu 20.04I

Question

I am basing myself on this guide: https://docs.microsoft.com/en-us/sql/connect/odbc/linux-mac/installing-the-microsoft-odbc-driver-for-sql-server?view=sql-server-ver15#ubuntu18

Which gives the commands>

if ! [[ "18.04 20.04 21.04" == *"$(lsb_release -rs)"* ]];
then
    echo "Ubuntu $(lsb_release -rs) is not currently supported.";
    exit;
fi

sudo su
curl https://packages.microsoft.com/keys/microsoft.asc | apt-key add -

curl https://packages.microsoft.com/config/ubuntu/$(lsb_release -rs)/prod.list > /etc/apt/sources.list.d/mssql-release.list

exit
sudo apt-get update
sudo ACCEPT_EULA=Y apt-get install -y msodbcsql18
# optional: for bcp and sqlcmd
sudo ACCEPT_EULA=Y apt-get install -y mssql-tools18
echo 'export PATH="$PATH:/opt/mssql-tools18/bin"' >> ~/.bashrc
source ~/.bashrc
# optional: for unixODBC development headers
sudo apt-get install -y unixodbc-dev

But I keep getting the following errors

root@ip-172-31-80-13:/home/ubuntu# sudo ACCEPT_EULA=Y apt-get install -y msodbcsql18
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package msodbcsql18
root@ip-172-31-80-13:/home/ubuntu# # optional: for bcp and sqlcmd
root@ip-172-31-80-13:/home/ubuntu# sudo ACCEPT_EULA=Y apt-get install -y mssql-tools18
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package mssql-tools18

I have tested on a new instance and I get the same error