Is there any RNAseq gene/transcript read count database for the mouse? I already know about ARCHS4, looking for some other source.
EBI has an expression atlas, including mouse: https://www.ebi.ac.uk/gxa/experiments?species=mus+musculus
If you click on one of the individual experiments you can download tables of TPM or RPKM per gene.
There are currently about 1000 individual experiments in different tissues etc.