Thank you for your question. Yes, you do have to claim all income received from investments even if it is less than $600. The $600 rule applies when you work as a self-employed or independent contractor and the company that you rendered the services to paid you less than $600 then they are not required to issue you a tax form 1099-NEC. That doesn't mean the income is not taxable. All income from all sources (Wages, self-employment, investments etc.) needs to be reported in the tax return.
When Schwab took over TD Ameritrade I suddenly got 1099s with income from trades in my IRA . I never experienced this before since everything was just added to the balance. I had a relatively large RMD which I donated all to charities before Dec 31 2023. I was told it had to do with the takeover. by Schwab?
You need to make sure that the investment is correctly coded with Schwab as an IRA. You should only be getting 1099 forms for distributions and rollovers. You need to contact them to correct any forms that were wrongly issued.