1. I think with 37,000 patents, TSMC will hit back on GF very hard in order to set an example and prevent any similar lawsuits in the future.The story continues:
Legal action could halt MacBook and Nvidia RTX sales in the US – while AMD’s GPUs are left alone
2. There is a possibility it's just a GF's tactic copied from the 1999 Digital vs Intel case. Abu Dhabi's Mubadala Investment Company (the owner of GF) wants to exit from semiconductor industry and they feel TSMC is the only one who may make a decent offer. So Mubadala Investment wants to force TSMC to buy GF. If the price is right and there are still enough and useful patents under GF's control, TSMC may consider it.
Intel to Buy Chip-Making Operations From Digital