Absolutely. Here's a random example (Google translation). It has both the aroma in it and the cheap, allegedly tasteless, truffles in it. They have another product that purports to have no aroma and the most expensive truffles in it (around 1%); kind of hard to believe.

Tartufi di Fassia Tartufata with black truffles is made in Italy exclusively with organic black truffles and the natural aroma of black truffles. This tartufata comes without any artificial flavors and you can taste this unadulterated and delicious taste with every bite.

Shipping weight: 120 g per piece

Ingredients:

Mushrooms (Agaricus bisporus), extra virgin olive oil, 6% summer truffle (Tuber Aestivum vitt), salt, parsley, black truffle flavored preparation* (extra virgin olive oil, black truffle flavorings), parsley, garlic*.

https://www.tasteatlas.com/truffle-industry-is-a-big-scam

What are black truffle flavorings?

Your guess is as good as mine, but presumably it's 2,4-dithiapentane.

If I get something in a restaurant (in EU) that has "truffles" in it the taste is exactly like described in the article. Kind of gross and very pungent. I don't exactly go to high end restaurants often.

I’ve definitely come across this kind of truffle oil in the UK, pre-brexit

How sure are you about the purity of the 'self-made' truffle oil?

Because it is made by you with good oil and good truffles?

He did not say he made it himself. In this case you can objectively compare. But if you get it from a friend from a friend, chances are it got truffle aroma mixed in, with good intentions, without knowing it is artificial but nonetheless.

It was made by a new-age-y friend with self-salvaged truffles.