Nucleosynthesis and element abundance - "Defying the Big Bang"

[RedshiftDrift]

"Defying the Big Bang: The Elements That Don’t Fit"
https://youtu.be/hovNhrIG-Ko

Has a good review of the difficulties in explaining element abundances, both for ΛCDM and plasma cosmology.

[LifeIsStrange]

See also: https://en.wikipedia.org/wiki/P-nuclei there aren't just issues with BBN nucleosynthesis but also with stellar nucleosynthesis.
(see also stars older than the universe)
It is also often forgotten that light isn't everything and that the chemical flux of cosmic rays that comes to us is anomalous.