Function calc_excess_blob_gas 

pub fn calc_excess_blob_gas(
    parent_excess_blob_gas: u64,
    parent_blob_gas_used: u64,
    parent_target_blob_gas_per_block: u64,
) -> u64

Calculates the excess_blob_gas from the parent header’s blob_gas_used and excess_blob_gas. Uses calc_excess_blob_gas_osaka internally.