Control.SetText doesn't change Text in ButtonRenderer - xamarin.forms

Question

I'm trying to set multiple styles on the text in a Button with ButtonRenderer. On Android, styles have to be set with Control.SetText() but both the styles and the text are not applied.
It's weird that when I use the same code with LabelRenderer it works as expected.
Here is the LabelRenderer
protected override void OnElementChanged(ElementChangedEventArgs<Label> e)
{
base.OnElementChanged(e);
if (Control == null || e.NewElement == null)
{
return;
}
var ce = (CustomLabel) e.NewElement;
var iconFont = Typeface.CreateFromAsset(Context.Assets, "fa-solid-900.ttf");
var spannableString = new SpannableStringBuilder();
var spannable = new SpannableString("");
spannableString.Append("Hello");
spannableString.Append(spannable, new CustomTypefaceSpan(iconFont), SpanTypes.ExclusiveInclusive);
Control.SetText(spannableString, TextView.BufferType.Spannable);
}
The result from LabelRenderer
And here is the ButtonRenderer
protected override void OnElementChanged(ElementChangedEventArgs<Xamarin.Forms.Button> e)
{
base.OnElementChanged(e);
if (Control == null || e.NewElement == null)
{
return;
}
var ce = (AfButton) e.NewElement;
var iconFont = Typeface.CreateFromAsset(Context.Assets, "fa-solid-900.ttf");
var spannableString = new SpannableStringBuilder();
var spannable = new SpannableString(ce.IconText);
spannableString.Append(spannable, new CustomTypefaceSpan(iconFont), SpanTypes.ExclusiveInclusive);
spannableString.Append(ce.Text);
Control.SetText(spannableString, TextView.BufferType.Spannable);
}
The result from ButtonRenderer which shows the original text sets in the Text attribute.
Have anyone experienced this? Not sure if this a bug or not.
Thank you in advance for the answers.

Answer 1

Use the following code
var iconFont = Typeface.CreateFromAsset(Context.Assets, "xxx.ttf");
Control.Typeface = iconFont;
Update
Set SpanTypes as ExclusiveExclusive
spannableString.Append(spannable, new CustomTypefaceSpan(iconFont), SpanTypes.ExclusiveExclusive);
CustomTypefaceSpan customTypefaceSpan = new CustomTypefaceSpan(typeface);
var spannableString = new SpannableString("Hello");
spannableString.SetSpan(customTypefaceSpan, 0, spannableString.Length(), SpanTypes.ExclusiveExclusive);
var span = new SpannableString("123456");
var spp = new SpannableStringBuilder();
spp.Append(spannableString);
spp.Append(span);
Control.SetText(spp, BufferType.Spannable);