Netplan - how to bring wifi interface up only?

On Focal ubuntu server, I just want the wifi interface to come up without trying to connect. I take my laptop to several coffee shops so it would not make sense to hard code the values here. Instead, I will use wpa_supplicant.

Right now the interface comes up but it tries to connect to the internet and timesout after 2 minutes. How can I make just the wifi interface come up without trying to connect? Also, would the only way be to decrease the timeout limit?

localhost# cat /etc/netplan/00-installer-config.yaml 
# This is the network config written by 'subiquity'
network:
  version: 2
  ethernets:
    enxa0cec83b0910:
      dhcp4: true
  wifis:
    wlp58s0:
      access-points:
        opennetwork: {}
      dhcp4: false