I'm unable to install PHP packages for Apache configuration

Sorry about that,this is what I'm getting when attempting to install the following packages, any inputs will be much appreciated.

yael@ypa-ubuntu-server:~$ sudo apt install php7.2 libapache2-mod-php7.2 php7.2-common php7.2-mbstring php7.2-xmlrpc php7.2-soap php-apcu php-smbclient php7.2-ldap php-redis php7.2-gd php7.2-xml php7.2-intl php7.2-json php-imagick php7.2-mysql php7.2-cli php7.2-ldap php7.2-zip php7.2-curl
[sudo] password for yael: 
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Package libapache2-mod-php7.2 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

Package php-smbclient is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

Package php7.2-common is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Unable to locate package php7.2
E: Couldn't find any package by glob 'php7.2'
E: Package 'libapache2-mod-php7.2' has no installation candidate
E: Package 'php7.2-common' has no installation candidate
E: Unable to locate package php7.2-mbstring
E: Couldn't find any package by glob 'php7.2-mbstring'
E: Unable to locate package php7.2-xmlrpc
E: Couldn't find any package by glob 'php7.2-xmlrpc'
E: Unable to locate package php7.2-soap
E: Couldn't find any package by glob 'php7.2-soap'
E: Package 'php-smbclient' has no installation candidate
E: Unable to locate package php7.2-ldap
E: Couldn't find any package by glob 'php7.2-ldap'
E: Unable to locate package php7.2-gd
E: Couldn't find any package by glob 'php7.2-gd'
E: Unable to locate package php7.2-xml
E: Couldn't find any package by glob 'php7.2-xml'
E: Unable to locate package php7.2-intl
E: Couldn't find any package by glob 'php7.2-intl'
E: Unable to locate package php7.2-json
E: Couldn't find any package by glob 'php7.2-json'
E: Unable to locate package php7.2-mysql
E: Couldn't find any package by glob 'php7.2-mysql'
E: Unable to locate package php7.2-cli
E: Couldn't find any package by glob 'php7.2-cli'
E: Unable to locate package php7.2-ldap
E: Couldn't find any package by glob 'php7.2-ldap'
E: Unable to locate package php7.2-zip
E: Couldn't find any package by glob 'php7.2-zip'
E: Unable to locate package php7.2-curl
E: Couldn't find any package by glob 'php7.2-curl'

I tried apt policy [one of the missing packages] for a couple of them and this is what I got.

yael@ypa-ubuntu-server:~$ apt policy php7.2
N: Unable to locate package php7.2
N: Couldn't find any package by glob 'php7.2'
yael@ypa-ubuntu-server:~$ apt policy php7.2
N: Unable to locate package php7.2
N: Couldn't find any package by glob 'php7.2'
yael@ypa-ubuntu-server:~$ apt policy libapache2-mod-php7.2
libapache2-mod-php7.2:
  Installed: (none)
  Candidate: (none)
  Version table:
yael@ypa-ubuntu-server:~$ apt policy php7.2-common
php7.2-common:
  Installed: (none)
  Candidate: (none)
  Version table:
yael@ypa-ubuntu-server:~$ apt policy php7.2-mbstring
N: Unable to locate package php7.2-mbstring
N: Couldn't find any package by glob 'php7.2-mbstring'

The php-smbclient was last available for 18.04 LTS officially.

To get it on 21.04 you have to use PPA:

sudo apt-get install software-properties-common

sudo add-apt-repository ppa:jnweiger/php-smbclient
sudo apt-get update
sudo apt-get install php-smbclient

Also please note that it is recommended to run LTS versions (like 18.04 LTS or 20.04 LTS) for reliable long-term server installations.