The block reward consists of two parts, the block subsidy and the transaction fees. The block subsidy is currently 6.25 ₿ per block and will halve at block 840’000 in about three months. The transaction fees depend on the current demand for blockspace and can therefore be fairly variable. The average feerates collected in the last 24h were 0.33 ₿ per block. About a month ago, miners briefly collected block rewards with transaction fees of over 7 ₿ per block:
via blockchair.com
If you know the average feerate in a block, you can easily estimate the transaction fees:
via mempool.space
Since blocks can have up to 1’000’000 vB in virtual size, 1 s/vB translates to 10 m₿ of transaction fees. So, ~38 sat/vB here indicates that the block collected about 380 m₿ = 0.38 ₿ in fees.
