The process is straight forward, but may require tweaks depending on the setup
sudo nft add table inet filter
sudo nft add chain inet filter input { type filter hook input priority 0\; }
sudo nft add set inet filter sshd_blocklist { type ipv4_addr\; flags interval\; }
sudo nft add element inet filter sshd_blocklist { 130.12.181.0/24, 77.83.39.0/24 }
sudo nft add rule inet filter input ip saddr @sshd_blocklist drop