The practice of asking all arrivals from abroad to have a negative PCR before travelling is widespread. Some countries have had a compulsory period of quarantine on top of that, some at a hotel for free.
One European country I know of tests (for free) incoming individuals on arrival and again at the end of quarantine. In April they dropped the quarantine requirement for double vaccinated arrivals from the EEA and USA. Past outbreaks have in every single case been traced to a breech of quarantine (they genome sequence and link/trace every single case). They have had single digit daily case numbers internally (border results are separate) for perhaps the last two months, many of them lately actually zero. They have detected the Delta (Indian) Variant at the border repeatedly over the past few weeks and isolated it. Their tourist business is rapidly increasing and they are reporting difficulties re-opening facilities/services fast enough to cope. The number of tourists expected this year is only going to be of the order of 25% pre-Covid levels but still double the local population - to proportionally match that loading the UK would need to accept 130 million visitors before the end of the year (actual around 42 million pre-Covid). I am unclear as to exactly how their vaccination rate compares with the UK's because they are vaccinating down to and including 16 year olds but I have seen lists suggesting they have vaccinated more people than the UK has, by any measure (percentage of adults, population, whatever).
The country concerned has of course not enjoyed the UK's World Beating success in anything, vaccination, deaths, number or severity of lockdowns, etc., etc. Now, while the UK population (as always) discusses access to pubs, whether to follow the rules because they are stupid, whether vaccinated people should be seen as different from those who are unvaccinated, etc., in that country they are seriously expecting to lift all restrictions within the country in less than ten day's time - vaccination will be complete by early August (except refusals). The external/border restrictions will remain for the immediate future. I am aware that there people are stunned by the UK's comparative failure, but are not crowing over their own comparative success (no claims of First Class, Leading, World's Best, etc.). There the comparison is, if anything, considered embarrassing (discomfort over the mess in full view "over there") because it was unexpected but above all that it should just go on and on is cringe inducing.