Blazor WASM Passing value from server to the client dynamically - function

Question

I've made an application with Blazor WebAssembly with a 5min timer in a BackgroundService into my SERVER.
Now, everytime a second change I would like to notify my client to update the timer on the CLIENT page. (it's a Component)
I was wondering if there was a solution to call a CLIENT C# Method from my SERVER by using a SERVICE between this two ?
Do you have any suggestion ?
I've already created the shared SERVICE but I don't know how I can call my CLIENT C# method from my Service automatically.
ps : I've already trying to pass my values from my SERVER to a SERVICE who call a JAVASCRIPT function (with IJSRuntime) who will call my C# function to update the timer. But actually my Js function seems to not working.
[My Background Task]
`
// A 5min timer who create a Draw every 5min and update it when count is at 0
public async Task ClockCountDownAsync()
{
if (secTime == 0 && minTime != 0)
{
if (minTime == 5)
{
Draw newDraw = new Draw();
_unitOfWork.Draws.Add(newDraw);
await _unitOfWork.Complete();
}
minTime = minTime - 1;
secTime = 59;
}
else if (secTime != 0)
{
secTime = secTime - 1;
}
else if(minTime == 0 && secTime == 0)
{
await DrawAndAddNumbers();
minTime = 5;
secTime = 0;
}
int[] timeTab = new int[] { minTime, secTime };
_timerService.GetTimeFromCounter(timeTab);
}
`
[My Client Function]
`
public async Task UpdateTimer(int[] timeTab)
{
minTime = timeTab[0];
secTime = timeTab[1];
await InvokeAsync(StateHasChanged);
}
`
[The function in a Service shared who is called by the SERVER who need to call the function from my CLIENT]
`
public void GetTimeFromCounter(int[] timeTab)
{
// UpdateTimer(timeTab);
}
`