Custom Fonts on Apple Mail

Question

I have a problem with the size of the rich text that automatically reduces and can not load the first font on Apple Mail Mobile 16.2, for a newsletter send by mailchimp

I integrated with the font-face as recommended by litmus / add on inline and css

@font-face {
font-family: 'Tiempos Headline';
src: url('https://domainname.com/assets/css/fonts/TiemposHeadline-Regular.woff') format('woff'), 
url('https://domainname.com/assets/css/fonts/TiemposHeadline-Regular.ttf') format('truetype');      
font-weight: 400;      
font-style: normal;      
font-display: swap;
}

p{
margin:0;
padding:0 0 16px;
font-size 18px;
line-height: 24px;
font-family: 'Tiempos Headline','PT Serif', Baskerville, 'Time New Roman', serif;
}

<div style="font-family: 'Tiempos Headline','PT Serif', Baskerville, 'Time New Roman', serif; font-size: 18px; ligne-height: 24px;">