The URL from the id field at the screenshot leads to 404 page:
https://my-beads.sho...-schaatsster/32
But at the https://my-beads.sho...au-schaatsster/page itself, everything is okay with the brand field, in the ld+json schema, it is present:
<script type="application/ld+json">
{
"@context": "http://schema.org/",
"@type": "http://schema.org/Product",
"name": "My-Beads zilveren Charm 618 Kunstschaatsen",
"sku": "EAN-9503449869197/MB618",
"mpn": "My-Beads",
"brand":
{
"@type": "Brand",
"name": "My-Beads sieraden"
},
"description": "My-Beads Charm 618 Kunstschaatsen\r\nAfmeting: 15 mm\r\nEdelmetaal: echt zilver, 925 (1e gehalte), nikkelvrij.Inclusief geschenkverpakking.Prijzen zijn incl. B.T.W\r\n\r\nCadeau tip voor: Schaatsster, kunstrijden op de schaats, trainster, wedstrijd gewonnen, kampioenschap.\r\nDeze zilveren My-Beads Charm is voorzien van een karabijnsluiting en past op vrijwel alle Charm armbanden.\r\nDit leuke sportsieraad is leuk om kado/cadeau te geven of te krijgen.\r\nMaak de set compleet er zijn nog veel meer leuke sportsieraden van My-Beads.\r\n#MyBeadsSport #Kunstschaatsen #Kunstrijden",
"image":
[
"https://my-beads.shop/images/watermarked/1/detailed/1/MB_618_250x250.png",
"https://my-beads.shop/images/watermarked/1/detailed/1/MB_618_500x500.png"
],
"offers":
[
{
"@type": "http://schema.org/Offer",
"availability": "InStock",
"url": "https://my-beads.shop/my-beads-zilveren-charm-kunstschaatsen-kunstrijden-cadeau-schaatsster/",
"price": 16.95,
"priceCurrency": "EUR",
"validFrom": "2022-07-28",
"priceValidUntil": "2022-08-07"
}
],
"aggregateRating":
{
"@type": "http://schema.org/AggregateRating",
"reviewCount": 1,
"ratingValue": 5
},
"review":
[
{
"@type": "http://schema.org/Review",
"author":
{
"@type": "http://schema.org/Person",
"name": "Tristan (Halsteren)"
},
"reviewRating":
{
"@type": "http://schema.org/Rating",
"ratingValue": 5,
"bestRating": 5
}
}
]
}
</script>
I can recommend you to contact Google Support on this case.