Claim: Sudden deaths for younger age ranges in Western Countries have been increasing significantly since 2020 or 2021.

Published in 2001

"The number of adolescents and young adults dying each year from sudden cardiac arrest rose by about 10% between 1989 and 1996"

So no, sudden deaths in younger age ranges has been increasing long before 2020.

"2020-2021 Excess Deaths in the U.S. General Population by Age and Sex" Published August 2022 by the Society of Actuaries data (they do the research for life insurance companies).

Findings:
118.3% actual to expected deaths in 15-34 year olds from March 22, 2020 - Jan 2, 2021, excluding deaths arributable to COVID-19
121.4% actual to expected deaths in 15-34 year olds from Jan 3, 2021 - Jan 1, 2022, excluding deaths arributable to COVID-19

The report states: "the highest overall A/E (actual to expected death) ratios occurred for ages 35-54 for both sexes in both years and the highest excess death percentage when COVID-19 is excluded was in ages 15-24 for females for both years and for males in 2020. When COVID-19 is excluded, the highest percentage for males was for ages 35-44 in 2021."

"Group Life COVID-19 Mortality Survey Report" Published May 2023 by the Society of Actuaries (they do the research for life insurance companies).

Findings:

"The 0–44 age band exhibited the highest A/E (actual to expected death) ratio across the pandemic period and has consistently shown the highest A/E by quarter since the middle of 2021....the 0–44 age band has the highest excess mortality from non-COVID causes (18.8%)"

According to CDC data, non-Covid excess deaths show a striking increase since 2020, when compared to 2019 as a baseline.