Can I host different web servers from different domains from 1 VPS? None of them are high traffic

Yes, that is possible. With virual hosts in Linux.
Like bindings in windows iis.

Setup for linux:
config etc/hosts
example server ip 192.168.1.111
192.168.1.111 domain1 domain2 domain3 ecc..

config vhosts for apache server example:
nano /etc/apache2/sites-available/000-default.conf
VirtualHost *:80
servername domain1
....

next
VirtualHost *:80
servername domain2

ecc...

PS you can have multiple php version too use libapache2-mod-fcgid config for ich vhosts php7.2-fpm, php7.4-fpm, php8.0-fpm ecc.