WiFi suddenly stopped working

I have Dell Inspiron 15 3000 laptop, using Ubuntu 22.04 for the last 4 months. Recently Wifi is not working very frequently, even though it is saying that Wifi is connected. To connect to the internet, I have to reboot again. I think the hardware might be working fine. I have tried some command to get some details.

 ➜  ~ sudo nmcli device

  DEVICE             TYPE      STATE         CONNECTION     
  device_id          wifi      connected     connection_name 

device is connected even if there are no internet connection.

➜  ~ sudo lshw -c network

  *-network                 
       description: Wireless interface
       product: RTL8821CE 802.11ac PCIe Wireless Network Adapter
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: 
       version: 00
       serial: 
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=rtw_8821ce driverversion=5.15.0-52-generic firmware=N/A ip=192.168.0.103 latency=0 link=yes multicast=yes wireless=IEEE 802.11
       resources: irq:74 ioport:2000(size=256) memory:c0700000-c070ffff

➜  ~ sudo lshw -businfo

Bus info             Device          Class          Description
============================================================
pci@0000:02:00.0     device_id       network        RTL8821CE 802.11ac PCIe Wireless Network Adapter

To solve this, I have followed this link, tried following command:

sudo apt-get install --reinstall git dkms build-essential linux-headers-$(uname -r)
git clone https://github.com/tomaspinho/rtl8821ce
cd rtl8821ce
chmod +x dkms-install.sh
chmod +x dkms-remove.sh
sudo ./dkms-install.sh

But still same result. To connect to internet, I have to reboot and then after 2-3 hours same issue.

How can I fixed this issue?