Repeaters are completely unsuitable because WLAN is a shared medium and a repeater halves the bandwidth. It has to transmit and receive on the same medium. If you already have the opportunity, like in a house construction, to wire properly, then you should also take that chance to do it right. Instead of repeaters, use access points. You can actually configure any router as a pure access point. You don't have to use expensive Fritzboxes. Even 20 euro devices work very well.
A few things have already been mentioned: You should use duplex cables (currently Cat7). Provide connections for access points (e.g. in the hallway on the ceiling). Power supply either via PoE (i.e. over the network cable with suitable devices) or install a socket. In the living room, provide connections for the TV, multimedia PC, PlayStation, Xbox, and devices that might come later. So maybe even 6 sockets? In the storage room/basement, provide a connection for a central storage (NAS (network hard drive), server). In the kitchen, there might eventually be a web radio and there are already refrigerators and coffee machines with network connections on the market. In the children's room, there will eventually be a computer, a TV with a network connection, and a game console.
It makes sense to distribute the telephone over the same wiring. So again: Where could phones be? Living room, hallway, kitchen?
Of course, you don't have to do all of this, but the cables are not that expensive, and wiring later will be really tedious. You can also initially install blank sockets or, as suggested here, at least empty conduits.