I have a55in LG tv bought in 2019 how can i get the ap for itvx?

Nice to meet you, *****!
On your LG TV remote, press the Home key to bring up the webOS Home bar.

Sure, *****
Step 2 : Navigate to LG Content Store in the Home bar and click it to launch.

Step 3: Head to the Apps tab at the top of the LG Content Store, then select the Search icon above.
Step 4: Now type “ITVX” in the following menu and click Search. Then choose the ITVX app from the top
“Apps” row.

Step 5: Once you’re on the ITVX app page in the LG Content Store, click the Install button to begin the download.

You need to type it in "Search" bar
Are you able to follow my instructions on your TV right now?
Or you can contact as anytime and I'll be happy to help you, sir

Of course, *****!
Are you going to do that now?

Great, please let me know how everything is going.

Please, on your LG TV remote, press the Home key to bring up the webOS Home bar.

Then, navigate to LG Content Store in the Home bar and click it to launch.

Please let me know once it's done.

Head to the Apps tab at the top of the LG Content Store, then select the Search icon above.

Have you reached that page?

Once there, please type “ITVX” in the following menu and click Search

How is it going, *****?

Got it, well done, *****!
Have you typed "ITVX" in the "Search" bar?

Can you take a picture of that screen?

Sure, I'll do my best to help you!
You need to take a picture using your phone's camera and then save this photo on your desktop.
To attach your screenshot to our chat, you need to press the paper clip button in the lower right corner of the chat window. Then you have to choose an image and confirm sending.

Sure, I can see it. Working on the solution, *****!
First of all lets update your TV:
Press the Settings button on your LG TV remote control.
Scroll down to the All Settings tab and click to expand it, then select Support.
Next, open the Software Update menu and click the Check for Updates
If there’s indeed an update pending, click Download and Install.

Is your TV older than 2016?

Then I am afraid the ITVX app is not supported on your TV>

Almost all of the apps are not supported on TVs older than 2016, so I would imagine that this one would also be unavailable.
Can you try searching for that app like you searched for ITVX?

Well if you think about it, the TV is 8 years old already. New standards for the streaming apps were only implemented in 2016, that's why older TVs don't have them.