The SIM card from the iPhone 15 does not fit directly into the Redmi Note 13 Pro+ 5G, as the iPhone 15 uses a nano-SIM and the Redmi Note 13 Pro+ 5G also supports dual SIM with nano-SIM. However, the question of whether the specific SIM card physically fits is not the main issue, but whether the SIM card is functionally compatible. The SIM card itself should physically fit, but the functionality depends on the network support.

If you have an eSIM from the iPhone 15, you need to check if your supplier supports eSIMs and if the Redmi Note 13 Pro+ 5G uses eSIMs. The Redmi Note 13 Pro+ 5G supports dual SIM, but support for eSIM is not explicitly stated.