Fruits, vegetables and wines from Israel are often wrongly labelled as “Produce in Israel” when they come from stolen Palestinian land. Boycott all produce from Israel in your supermarket and demand they are removed from shelves.

• In the EU, US and Canada, produce is required to have a label/sticker that cites its origin. (I believe UK as well)
• If you're in the US, some of these produce (especially avocado) are not very likely to come from Israel, however, in the EU they can. Most avocados still come from Middle/South America, but I remember buying some a few years ago and only seeing the "produce of Israel" sticker at home. Unlikely doesn't mean never though. Always check the labels!
• Dried fruits or in any way processed fruits, veggies and crops are more likely to be imported into North America. There should also be a "made/produced/manufactured in" line on the packaging.
• As a rule of thumb, the closer to Israel you are - i.e. Europe - the more likely you'll find Israeli produce in your supermarkets, particularly produce that grows in a warm subtropical climate.
• Produce isn't all that Israel is exporting. Here's a list of imports into the US by product groups. https://tradingeconomics.com/united-states/imports/israel So it's worth checking any manufacturing labels on products you want to buy. The same goes for the EU and the UK of course.
• PRIVATE BOYCOTTS ARE NOT ILLEGAL! There are laws in the US and other places that prohibit or sanction BDS measures against Israel, but that only goes for public persons and companies who openly participate in BDS. As a company, you can still say "We got a better offer for this product from country XY", but you're not allowed to say you are deliberately doing this because you want to boycott Israel. As a private person, however, nobody can force you to buy anything or even control what you buy or refuse to buy in the first place. So don't worry about that.