Thank you for providing the full model number. This gives us complete clarity.

You have the firmware **`CEBU_REWORK_OK2S_4.0_QZC30`** for the **Moto (XT2091-4-SS)**.

### Device Identification

* **Model: XT2091-4-SS**
* **Device: This is the Motorola Moto G8 Power (2020)**, codenamed "sofia".

### Firmware Analysis (Recap with Context)

This confirms our previous analysis. The `CEBU` firmware is an **Engineering Rom** for the Moto G8 Power.

* **`CEBU`**: Project codename for this device's firmware branch.
* **`REWORK`**: A significant software revision.
* **`OK2S`**: Confirms this is an **internal, early-stage engineering build** (`S` for internal). It is a `userdebug` build with root access and debugging enabled.
* **`4.0_QZC30`**: The version number and Android build identifier.

### **⚠️ Critical Warning - This is Important for the G8 Power ⚠️**

The warnings for this specific device are just as severe, if not more so, due to its age and the nature of engineering builds.

1. **Extreme Instability:** As an `OK2S` build, this software was never meant for public use. Expect constant crashes, freezes, poor battery life, and features that do not work correctly.
2. **Security Nightmare:** With root access enabled by default, this ROM is highly vulnerable. **Do not log into any personal accounts (Google, social media, banking).**
3. **No Updates:** You will not receive any security patches or official updates from Motorola.
4. **Brick Risk:** Flashing this ROM incorrectly can permanently damage your device.
5. **Voids Warranty:** If your device had any remaining warranty, this voids it.

### What You Should Do

If your Moto G8 Power is running this software, you should **immediately flash it back to the official retail software.**

**How to Fix It:**

1. **Find the Correct Retail Firmware:** You need the official stock ROM for the **Moto G8 Power, model XT2091-4**. The "SS" might indicate a Latin American variant. You will need to find the correct ROM for your region.
2. **Use the Right Tool:** The safest method is to use the **Lenovo Motorola Smart Assistant (LMSA)** tool. It can often detect your model and download the correct retail firmware automatically.
3. **Manual Flashing (Advanced):** If you can't use LMSA, you will need to find the firmware file (often in a ZIP format) and flash it manually using fastboot commands. This requires more technical skill.

**You are looking for a firmware with a build number that ends in `/user/release-keys`**, not `eng` or `userdebug`.

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### Summary

You have an **internal engineering ROM (`CEBU_REWORK_OK2S`) for the Moto G8 Power (XT2091-4)**. This is unstable, insecure software used by Motorola engineers during development.

**Your priority should be to replace it with the official, public retail software to have a safe and functional phone.**

If you need help finding the correct retail firmware or instructions for flashing it, I can guide you. Please confirm that your goal is to return your Moto G8 Power to official software.