Two statements sit side by side: every ingredient dose is printed on the label, and the page itself shows no milligram amounts.
It may well be that the bottle's Supplement Facts panel lists amounts. The claim does not say the website will. Still, the header says every ingredient is checked against the label, yet a reader of the page cannot check anything, because the figures are not shown.
That leaves a gap: you are asked to trust a label you cannot see before buying.
Ask the seller for an image of the Supplement Facts panel and for the amount of each of the eight ingredients per gummy. A seller that prints the doses should be able to send them. Keep the reply, and compare it with the bottle when it arrives.