How to use the repo to connect with a running Chrome browser and upload files?

[zydjohnHotmail]

Hello:
I want to use the repo to connect with a running Chrome browser, then from the current page, find a file upload button and click the button and select one file from my local PC and upload it.
I have the following C# to run Chrome browser first:

Process ChromeProcess = new()
{
StartInfo = new ProcessStartInfo
{
FileName = @"C:\Program Files\Google\Chrome\Application\chrome.exe",
Arguments = $"https://www.bing.com/ --new-window --remote-debugging-port=9222 --user-data-dir=C:\ChromeData"
}
};
ChromeProcess.Start();
I have the following component definition:

using _ = TikTokPage;

[Url("https://www.tiktok.com/@userXXX?lang=en")]
public class TikTokPage : Page<_>
{
    public H1<_> Header { get; private set; }
    [FindByXPath("@href='https://www.tiktok.com/upload?lang=en'")]
    public Link<_> Upload { get; private set; }
    [FindByClass("tiktok-btn-pc", Visibility = Visibility.Any)]
    public Button<_> Post { get; private set; }
}

I can verify web page after I login to TikTok by hand, like the following:
AtataContext.Configure()
.UseChrome()
.WithOptions(x => x.DebuggerAddress = $"127.0.0.1:9222")
.Build();
Go.To()
.PageTitle.Should.Equal(TikTok_Title);
However, I don’t know how to click on the “Upload” button.
My code:
AtataContext.Configure()
.UseChrome()
.WithOptions(x => x.DebuggerAddress = $"127.0.0.1:{ChromePort}")
.Build();
Go.To()
.PageTitle.Should.Equal(TikTok_Title)
.Upload.Click();
The above code didn’t work for .Upload.Click();

From DevTools in Google Chrome, I can see the “Upload” button is the following element:

I can see the href is fixed, the other, like svg class is dynamic.
I want to know how I can click on the “Upload” button inside TikTok home page?
[FindByXPath("@href='https://www.tiktok.com/upload?lang=en'")] is not correct.
How to find a SVG element below the "A" link?

From testing by hand, I can see that after I click on “Upload” button, and in the open file dialog, I can select a local video file, then there is a hidden button is shown.
The hidden button has the value “Post”, then I can click on “Post” button to finally upload a video file to TikTok, my home page.
Please advise on how to write the code for this.
Thanks,