To estimate the trend in Moody's adjusted leverage for Naturgy Energy Group SA in 2022, we examine the evolution of the company's financial position and profitability:

1.  **Profitability (EBITDA):** The company’s EBITDA grew significantly from 3,529 million EUR in 2021 to 4,954 million EUR in 2022, representing a robust increase in operating performance.
2.  **Debt Profile:** "Longterm Borrowings" decreased from 13,786 million EUR (2022-01-01) to 12,689 million EUR (2023-01-01). While "Current Borrowings" increased, the overall reduction in long-term debt and the strong growth in EBITDA suggest a strengthening of the credit profile.
3.  **Cash Flow:** The "Cash Flows From Used In Operating Activities" improved substantially, rising from 1,001 million EUR to 4,242 million EUR. This indicates a much stronger capacity to service debt internally.
4.  **Leverage Ratio Proxy:** With EBITDA rising sharply and debt levels (specifically long-term borrowings) decreasing, the Debt/EBITDA ratio (a primary component of Moody's leverage adjustments) would have trended downward during 2022.

Given the significant increase in operating cash flow and EBITDA combined with the reduction in long-term financial liabilities, the company's credit metrics improved during this period.

<answer>Improving</answer>