It will depend on the fibre standards being delivered to your apartment. Do you know if they’ll be delivering ethernet over the fibre, or another protocol? And if ethernet, will they be doing anything with VLAN tagging that you need to enable in your apartment?
As Jono stated all depends on how the ISP presents the fibre but if you are looking for a firewall with SFP WAN fibre module capability then a Ubiquiti USG Pro 4 for a cost effective product.
The telco will almost certainly be able to indicate or even provide compatible routers. Buying ahead of time has risks such as a router with a standard half duplex ONU and then finding out there is full duplex (two fibre cables bundled together) run to your apartment from the building MDF (very possible if it is a mixed commercial/residential building).
But if you calk the telco now, they can almost certainly guide you.