I also see this JSON in the html code which you can try and grab as variables to reuse in GTM.
"name":"Free Introductory Class (18Jan23) \u2014 Advanced Coaching Practicum",
"image":"http://static1.squarespace.com/static/606fac27ab8eb21ff5f16564/60b3ab98d093263ad52f5867/63c029671767ad706d92baa3/1627923825482/Free+Intro.png?format=1500w",
"description":"",
"brand":"Advanced Coaching Practicum",
"offers":{
"price":0.00,
"priceCurrency":"USD",
"url":"https://www.advancedcoachingpracticum.com/store/p/free-introductory-class-5chgk-mkztn-5h9wz-6j8tp-swxk5-gk85z",
"availability":"InStock",
"sku":"SQ3672870",
"@context":"http://schema.org",
"@type":"Offer"},
"@context":"http://schema.org",
"@type":"Product"}