ASML's annual report says, "Changes in export controls may have a material impact on our business for example on the sales volume, mix and timing, " and China accounted for about 29% of its 2025 net sales in the geographic breakdown of its annual report.
While TSMC looks like the better buy to me, I'd be a patient buyer, as shares of both companies have risen sharply over the past year and TSMC's production is concentrated in Taiwan.
Investors often compare them because their businesses are closely linked, even thou.