According to mempool data, an empty block (i.e., a block that only contains one transaction, Coinbase, a block reward) was mined at Bitcoin height 844293 10 minutes ago, and the time interval with the previous block height was only 23 seconds. Miners pack empty blocks for economic reasons, and this is the wisest choice for miners. In order to make full use of this time for mining and avoid conflicts with transactions packed in the parent block, miners cannot fill transactions into the block, which means that miners can only try to mine empty blocks. (Mempool)