To assess whether ENEL - SPA is suitable to issue hybrid bonds, we look at its size, profitability, and its current capital structure, particularly whether it already participates in the hybrid bond market. 

1. **Existing Hybrid Bonds:** The data explicitly shows that ENEL currently has hybrid bonds outstanding. The company reported €5.567 billion under `"Equity" "Equity Instruments Perpetual Hybrid Bonds Member"` at the end of 2022. It also reported a `"Coupon Paid Hybrid Bonds"` of €123 million for the 2022 period and previously issued €3.18 billion in hybrid bonds during 2021. The fact that the company has a massive, established presence in the hybrid debt market is a very strong primary indicator of its suitability. 
2. **Financial Scale and Profitability:** ENEL is a massive global entity with robust operations. In 2022, the company generated `"Revenue"` of €140.5 billion and a `"Profit Loss From Operating Activities"` of €11.19 billion.
3. **Cash Flow Generation:** ENEL's `"Cash Flows From Used In Operating Activities"` stood at €8.67 billion for the 2022 period, showing strong internal cash generation capabilities which easily cover financing costs, including its coupon payments on existing hybrid bonds.
4. **Capital Structure:** The company boasts a significant `"Equity"` base of €42.08 billion against total `"Assets"` of €219.6 billion, allowing it to leverage hybrid instruments to optimize its cost of capital while maintaining favorable credit metrics.

Given that ENEL already successfully issues and services billions of euros in perpetual hybrid bonds, backed by strong cash flow and immense operational scale, the company is an exceptional candidate for issuing hybrid capital.

<answer>Strongly Suitable</answer>