Irrespective of whether your electricity is renewable or not, it does not come from a single power plant, but from a combination of sources. Except for very large customers, your supplier does not buy electricity for you at the time you sign the contract, but regularly buys slices of the foreseeable future consumption at different points in time, depending on its purchasing strategy and the opportunities that arise.
Some of these contracts are indexed to the stock market price, even if they are renewable sources. This means higher prices on the wholesale markets lead to new contracts, including with renewable generators, being concluded at higher prices. These new contracts replace expired contracts or those covering additional demand.
It should be noted, however, that the evolution of retail prices lags behind the evolution of wholesale market prices, either because some contracts from before the price increase continue to exist, or simply because the supplier has its own production facilities.