I known that plasma mobile is for mobile phones, but I don’t have a PinePhone, can I run plasma mobile on my PC? Does plasma mobile have a interface for tablet?
ARM64 (aarch64) and AMD64 (x86-64) are two very different processor architectures. The only way to run aarch64 code on x86-64 would be by way of a virtual machine monitor that allows emulation of a different processor architecture.
So, the short answer is “No, you cannot”. 
A longer answer to this question:
While it is difficult to run Manjaro Plasma Mobile on a regular PC, it is possible to use other distributions that have Plasma Mobile compiled for x86-64.
KDE Neon:
KDE Neon with Plasma Mobile is no longer updated. However The old Images can still be tested in a VM.
Link to the image: KDE - Experience Freedom!
Postmarketos:
Postmarketos has a tutorial(sort of) on how to set up a QEMU installation with PMBootstrap.
Link to the Wiki: QEMU amd64 (qemu-amd64) - postmarketOS
The x86 64 Neon-based Plasma Mobile image is for you if you want to try out Plasma Mobile on an Intel tablet, desktop/laptop, or virtual machine. The Plasma Mobile documentation has instructions on how to instal it permanently.