The following are some examples of non-tariff barriers:

China requires foreign rice to be sterilized in fumigation facilities before shipping. Fumigation disinfects or purifies using fumes of certain chemicals. Japan has complained against this requirement arguing that there are only seven fumigation facilities in Japan. Building a fumigation facility is reported to be costly[1].

In January 2020, the U.S. and the U.K. negotiated on a new trade agreement after the U.K.'s exit from the European Union. Among the U.S. negotiating objectives included to grow U.S. farm exports to the U.K. A key focus was on removing non-tariff barriers that included: a) restrictions on chlorine-treated chicken, b) genetically modified crops and c) hormone-treated meat. Such products are consumed commonly in the U.S. but British consumers are against them^[2].

Please try to find similar examples and reply to this thread.