networking – How to disable 802.11ac on Ubuntu 21.04?

I want to know how to disable the 802.11ac in Ubuntu 21.04 on my laptop.
I’m new to Ubuntu,my laptop has an Intel AX201 wireless card,which supports 802.11ac.But I don’t want to use the 5GHz signal because my room is far from router and the signal is weak.I tried to google this question,but got no answer.
The infomation of my card:

# lshw -class network
*-network                 
       description: Wireless interface
       product: Comet Lake PCH CNVi WiFi
       vendor: Intel Corporation
       physical id: 14.3
       bus info: pci@0000:00:14.3
       logical name: wlo1
       version: 00
       serial: 40:ec:99:f3:ed:91
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwlwifi driverversion=5.11.0-22-generic firmware=59.601f3a66.0 QuZ-a0-hr-b0-59.u ip=192.168.3.200 latency=0 link=yes multicast=yes wireless=IEEE 802.11
       resources: irq:16 memory:c551c000-c551ffff