Hybrid bonds are typically issued by firms with robust equity base and stable earnings, and where hybrid capital can be recognized as part of equity or a quasi-equity liability. From the provided data:
- The company has Hybrid Capital line item constant at 2,125,000,000 EUR for 2022 and 2023, indicating existing hybrid capital and potential for further issuance.
- Equity Attributable To Owners Of Parent (2023) is 7,258,000,000 EUR and total Equity (2023) 7,713,000,000 EUR, with negative unappropriated result of -967,000,000, but overall sizeable equity base.
- Profit/Loss for 2022-2023 is net loss (-967,000,000 to -910,000,000 attributable to owners). This suggests losses in year; however, hybrid capital often has loss-absorption features and can be used even in loss years, but rating agencies scrutinize earnings stability.
- Cash flows and debt: Longterm Borrowings 19,006,000,000 EUR; Net financing positive in 2022. They have current and noncurrent liabilities with substantial amounts. They operate as a transmission system operator, regulated, with stable demand.

Question is whether suitable to issue hybrid bonds. Given presence of existing hybrid capital and maintained equity base, and given regulatory nature, it could be considered as part of capital structure. However the recent year shows net loss, which may affect ability to absorb coupon/distributions; but hybrids are subordinated instruments that may absorb losses.

Overall, data suggests marginally suitable to issue additional hybrids, given existing hybrid capital and strong regulatory utility profile, but profitability volatility may pose risk. So: Marginally Suitable. 

<answer>Marginally Suitable</answer>