That is not how tariffs work. There are at least 3 actors in an international supply chain. 1) manufacturer 2) retailer 3) consumer
It varies on every products the amount of margin squeeze for each of the actors. It is entirely possible that the margins are high enough that the consumer sees no increase in price. Especially in the environment we exist in now.
A manufacturer and importer may absorb all tariff costs if they feel the consumer would be pushed to just not buy if the price increased. Profiting 70% by absorbing the tariff is better than Profiting 0 by pricing yourself out of the market.
But like I said.... every product is different and each actor has margin and it is different for every item.