Why is the block size so big, taking into account a relatively small number of transactions?

[Bitcoin]

Why is the block size so big, taking into account a relatively small number of transactions?

Why the size of the block 656143 is so big (Size: 2,337,727 bytes), taking into account a relatively small number of transactions (Number of Transactions: 84)?

Extra question: What is the block size limit in Bitcoin nowadays?
I found some guidelines here:

Bitcoin blocks now have a theoretical maximum size of 4 megabytes and a more realistic maximum size of 2 megabytes.

However, the size of the block 656143 is ~2.3Mb; therefore, a "more realistic maximum" is not that realistic :)

Source: Why is the block size so big, taking into account a relatively small number of transactions?