Hi, Is it available to have two different macOS in the same MacBook Pro?

Hi,

Yes, you can. following article could help your question.

Use more than one version of macOS on a Mac - Apple Support

It depends.

It is no problem with the Intel Macs, but I've seen a few posts on these forums that M1/M2 Apple Silicon Macs may have problems booting more than one OS (even then you only have two options Big Sur & Monterey). I haven't tried installing macOS to an external drive with an Apple Silicon Mac.

You can install any version of macOS from the version which shipped with the Mac from the factory to whatever the latest version of macOS which is compatible with your Mac.

It is risky installing multiple operating systems to a single drive because people usually find neither OS has enough storage space. Things usually go wrong when people try removing one of the operating systems. A less risky option is to install macOS to an external USB3 SSD. If you have an Intel Mac, then you can install macOS in a Virtual Machine (Parallels, VirtualBox, etc.) depending on the workloads since a VM shares the CPU & memory resources between both operating systems and performance will be a bit slower on the OS running in the VM.