The deadline for EU nationals and eligible non-EU nationals to apply for settled status through the EUSS scheme was 30th June 2021. However, you can still apply if you can prove you have ‘reasonable grounds’ for why you missed the deadline. This could be for many reasons, such as being unwell or not having internet access to obtain relevant documents. More information is available here
Having settled status is very helpful when seeking financial support in the event of losing a job or struggling to pay rent as it automatically proves that you have a right to reside in the UK.