It is interesting to observe the pronounced jump in the signing of zones in .com over the past three years, where the number of signed zones has increased from 1.5M at the start of 2020 to some 7M today.
A recent report (February 2023) on this question was published by the folk at SIDN. They reported that some 60% of all .nl domains are DNSSEC-enabled (Figure 4). This appears to have been a result of positive incentives for DNSSEC adoption, including financial incentives.
VIA APNIC Blog