To assess whether Iberdrola S.A. is suitable to issue hybrid bonds, we need to evaluate its financial size, profitability, cash flow generation, and capital structure using the provided data for the 2022 fiscal year:

1. **Size and Scale**: Iberdrola is a massive, capital-intensive corporation. By the end of 2022, it reported Total Assets of €154.67 billion and Revenues of €53.95 billion. Companies of this enormous scale are well-positioned to access complex debt capital markets, including hybrid bonds. 

2. **Profitability and Cash Flow**: The company demonstrates exceptionally strong and stable profitability, generating a Gross Profit of €20.20 billion, an EBITDA of €13.23 billion, and a Net Profit of €5.06 billion. Furthermore, its Operating Cash Flow is extremely robust at €10.44 billion. This level of steady cash generation is characteristic of large utility companies and is highly attractive to fixed-income investors seeking reliable coupon payments.

3. **Capital Structure and Leverage**: The company's Total Equity stands at a healthy €58.11 billion. However, it also carries substantial debt, with Noncurrent Financial Liabilities of €44.22 billion and Current Financial Liabilities of €25.08 billion (Total Financial Liabilities of ~€69.3 billion). 

**Conclusion**: 
Utilities like Iberdrola are historically the most frequent issuers of corporate hybrid bonds. Because hybrid bonds are typically treated as 50% equity and 50% debt by major credit rating agencies, issuing them allows highly capital-intensive companies to fund massive infrastructure and renewable energy pipelines without putting downward pressure on their credit ratings. Given Iberdrola's massive balance sheet, excellent liquidity, stable utility cash flows, and ongoing capital needs, it is an optimal candidate for issuing hybrid capital. 

<answer>Strongly Suitable</answer>