Not board, devkit or etc. just want to add riscv core to pio and i want to observe the registers

I want to add ibex riscv core to platformio and run C code or riscv assembly code on it, I am new here, I would be very grateful if you could help me.

Sounds like you’re looking for an emulator?
PlatformIO is a cross-platform, cross-architecture, multiple framework, professional tool for embedded systems engineers and for software developers who write applications for embedded products.

Does using PIO as an emulator provide debugging capabilities similar to those in this video?

There is still a misunderstanding: PlatformIO is not an emulator but a development environment.

However, you can use an emulator like Wokwi for example.
Wokwi for vscode also supports debugging.

You can try the following configuration to emulate SiFive RISC-V:

platform = sifive
framework = freedom-e-sdk
board = hifive1
build_type = debug
monitor_speed = 115200
debug_tool = qemu
; debug_tool = renode

See the full example