Equity issuance bottomed in 2023 and is coming back, but as a proportion of market cap, it's not even at the historical average. Academic literature shows big issuance booms happen when markets are doing well and earnings look good. The next IPO is 0.12% of S&P market cap, which is not a major concern. Normal volatility is 3-5% pullbacks every 2-3 months.
Index inclusion issues might have a slightly bigger impact, but historically, the numbers don't suggest a significant negative effect.