I wonder if there was a set of raised rubber feet available.
Sometimes, I face the issue that the Framework 13 laptop would lack sufficient cooling due to insufficient airflow, especially when using it on a table with a table cloth on it.
Unfortunately, there isn’t really a way to lift up the laptop built directly into it apart from the feet. If you want to angle your laptop, I would recommend either just purchasing a laptop stand, or a laptop cooler that has a stand built in.
The cheap laptop stands usually aren’t very effective, so just purchase whichever one you think is cheaper or works better for you.
Another option I saw for the Framework 16 were a pair of laptop legs kind of like the ones on keyboards, but that would not work for the Framework 13 due to the height limitations and mainly the expansion cards being placed so forward.
I just received this (https://www.aliexpress.com/item/1005007523438376.html) new Ugreen stand that attaches to the laptop using some very strong adhesive. Works perfectly for me and also adds some extra height when the laptop stand is not opened up.