In a discussion that took place on a Discord server focused on SHIB, ShibaSwap developer Eric M said that Shibarium, Shiba Inu's Layer 2 scaling solution, will arrive "soon" but did not mention an accurate date. However, he revealed that Shiba does not have to wait for Ethereum 2.0's deployment to release Shibarium.
https://www.notebookcheck.net/ShibaSwap-developer-Eric-M-Shiba-Inu-s-Layer-2-solution-coming-soon.588157.0.html