To determine if ENGIE is suitable to issue hybrid bonds, we can evaluate its financial position and capital structure based on the provided data for 2022:

1. **Industry and Scale**: ENGIE operates in the utility and energy sector, which is highly capital-intensive (reflected in robust capital expenditures of over 6.3 billion EUR). Companies in such sectors are prime candidates for hybrid bonds, as they often require substantial funding for long-term infrastructure projects without diluting their equity or straining senior debt ratings.
2. **Revenues and Cash Flow**: The company generated massive revenues of 93.87 billion EUR in 2022 (up from 57.87 billion EUR in 2021) and has a very strong operating cash flow of 8.59 billion EUR. This reliable cash generation proves its ability to service the regular coupon payments associated with hybrid debt.
3. **Existing Capital Structure**: The most definitive indicator of ENGIE's suitability is its existing balance sheet. The data explicitly shows "Deeply Subordinated Perpetual Notes" valued at 3.39 billion EUR at the end of 2022. Deeply subordinated perpetual notes are the standard accounting classification for corporate hybrid bonds under IFRS. This confirms that ENGIE already successfully issues and manages hybrid bonds.
4. **Equity Base**: With a total equity of 39.29 billion EUR and total assets of 235.49 billion EUR, ENGIE has a massive balance sheet capable of absorbing the subordination features of hybrid issuance, which rating agencies treat partially as equity to protect senior credit ratings. 

Because ENGIE already utilizes hybrid bonds as an established part of its capital structure and demonstrates the immense scale, steady cash flows, and capital-intensive nature typical of hybrid issuers, it is an ideal candidate.

<answer>Strongly Suitable</answer>