The most recent actual game update for Animal Crossing: New Horizons came in mid May with the minor release of Version 1.2.1 bringing a fix to varied item duplication exploits. Since then, we haven’t seen any longer updates released, minor or major.
As for when subsequent major update might happen, we’re expecting one to arrive in around a couple of weeks once we approach the start of July. That’s because the present Wedding Season event ends on June 30th and there are not any further events beyond that within the game immediately.
When you walk on your island each day, you might come across a glowing glow in the cracks in the mud. If you dig it up, you'll easily get 1,000 bells, but if you bury some bells there, you'll grow a tree that produces bells! This isn't the most consistent or quick way to get money, but it's relatively easy. If you opt to rebury the Animal Crossing Bells, you will have a 30,000 cash cow in a few days.
One of the most effective ways to make bells is to catch and sell fish and bugs. In the shadows lurking near the edge of the island, or the flowers towards the bushes, you can catch fish and insects for sale, which is considered to be one of the fastest ways to make Bells in "animal crossing new horizons". Of course, different biological species will bring you a different number of ACNH Bells.