Nope, the last episode is a couple of minutes longer and there's also changes to which OST tracks are used in other episodes in various scenes. Some episodes that didn't have the OP/ED during the broadcast now have it on the home video version so there's some mismatch there as well.
Weathering With You will get released with a 4K Collector's Edition Blu-ray and Standard Edition Blu-ray & DVD on the 27th of May in Japan.
The release will have Japanese, English and Chinese subtitles
Blu-ray＆DVD 2020.5.27 ON SALE 映画『天気の子』公式サイト
Most of the time I end up buying MVM's releases over importing the JP/US ones. Heaven's Feel was one of the few times where I imported the JPBD as soon as it came out because I wanted to own the film as soon as possible (plus the set was really nice), I've got Heaven's Feel 2 on pre-order from...