Segwit limited the block weight to 4,000,000 weight units (WU). Blockspace has been almost fully demanded since Inscriptions started taking off around February 15th, 2023. Bitcoin Core reserves 4000 WU for the coinbase and block header, so I’ll count any block above 3,960,000 as full.

There have been 119,418 blocks since February 15th 2023. Out of those, 341 blocks were empty (below 2000 WU), 1155 blocks were non-empty up to 90% full (i.e. between 2001 and 3,600,000 WU), 292 were between 90% and 99% full (3,600,001–3,960,000 WU), and 117,630 have been full (3,960,001 or more). In the past ~27 months, 98.5% of all blocks were using at least 99% of the block weight. I have no idea what you are talking about when you say that blocks are not full.