Why is my WordPress website's SEO performance suddenly dropping?

Recently I've been experiencing some anomalies in the SEO of my WordPress site, and I'd like to ask for your experience.

The site has been performing normally for the past three months, but since the beginning of this month, the following has occurred:

• Exposure is growing, but clicks are down

• CTR is lower than last month by about 0.5%

• Search Console has a lot of "Found - not currently indexed".

• Some pages are marked as "crawled but not indexed".

• No "Submitted" message after indexing a request

I've checked:

• Rank Math Title and description normal

• No restrictions on crawling robots.txt

• The pages are all accessible without 404 or redirection issues

• No cache plugin installed

• Site speed is normal, LCP, CLS performance is also good

• The content has been updated recently and a few new articles have been added as well

Still, SEO continues to decline, and it's not certain that the Google Updates Algorithm nevertheless Internal site configuration issuesThe

Has anyone experienced a similar situation? What directions should I look to troubleshoot?
Some advice would be appreciated, thanks!

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