The 2019–20 coronavirus pandemic resulted in the closures of many parks. “A walk in the park” usually means something easy.
 
“I’ll say this about #lockdown - it’s no walk in the park!” was posted on Twitter by Martin Harrison on March 26, 2020. “This lockdown lark is no walk in the park” was posted on Twitter by Colintine on April 9, 2020.
 
   
Wikipedia: 2019-20 coronavirus outbreak
The 2019–20 coronavirus pandemic is an ongoing global pandemic of coronavirus disease 2019 (COVID-19), caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The outbreak was first identified in Wuhan, Hubei, China, in December 2019, and was recognised as a pandemic by the World Health Organization (WHO) on 11 March 2020.
         
Twitter
Martin Harrison
@haricature
I’ll say this about #lockdown - it’s no walk in the park!
5:17 AM · Mar 26, 2020·Tweetbot for iΟS
 
Twitter
Colintine
@Col_Thomas
This lockdown lark is no walk in the park
2:19 AM · Apr 9, 2020·Twitter for Android
 
Reddit—Dadjokes
Posted by u/SeriouslyGetOverIt April 17, 2020
Quarantine is difficult…
It’s certainly no walk in the park.